I was finally able to spend some quality time with the rig, being able to try all sorts of combinations, settings, etc. and I must say I'm impressed. First Impressions I pretty much agree on the four criteria John Wentzien set in his first review (Sound, Portability, Value, and Durability) for determining if an amp is good for me, so I hope he doesn't mind if I use his format. I mainly play rock and I really like that warm, fat, tubey sound albeit I've been on solid state products for years since I sold my SVTs over 20 years ago. Depending on room or where I am in the mix, I'll roll in some low-mids/high-mids to cut through. Sound Plugging in for the first time with my Alleva-Coppolo I thought the sound was just a little off so I rolled off the lows and mids 2-3 notches and boosted treble 3 notches and I got the baseline sound I typically get with my LMII or G-K while flat, at least according to my ears. However, I also found out that the flat settings were perfect for the bridge pickup soloed. The 2x10 alone still served up my sound with clarity, retaining plenty of lows while the 2x12 was, as expected, deeper and more boomy. I felt the RS212 lost just a little clarity which sparked the question of what a pair of RS210's sounded like. Granted, my office, which has high ceilings and a hard Pergo floor isn't ideal for any sound test, not to mention the rattling grates, etc., and RS212 could have been just coupling with my floor, so I'm going lift it off the floor later today to see if it make a huge difference. As of now, I prefer the sound of the 2x10 which by itself would definitely be plenty for small-medium sized gigs. Using both cabs together gave me that sound that I have in my head. Even when cranked, the cabs still produced without getting muddy. The next thing I did was to add a little compression (I typically use a BBE OptoStomp to even things out across the register very sparingly) and add some TubeTone. The RH450 sounded even better. There are probably only a handful of tunes where I typically add dirt using a Badder Monkey, and cranking the Tube emulation on the RH450 sounds just as good when compared to the level of dirt I use. Overall, I'm confident I'd be able to get great tone out of the RH450 for all of my basses. The Valenti and Sadowsky 24F5 sounded just as good, in their own way, using the patch I set up for the A-C. I'm probably going to reserve patch 2 for occasional jazz and for my Rob Allen Mouse which sounds great flat without compression or tube tone, and then use the 3rd for the dirt. I can't wait to see what the rig sounds like in a band situation. I've got a rehearsal tonight, so we'll see what happens. The practice space is much more dead than my high-ceiling, pergo-floored office, and there aren't many things to rattle, so it'll be an entirely different experience. Portability The RH450 is a little heavier and more 'bulky' (if there is such a thing in an amp in this size class) than my LMII or MB2-500, however it still fits perfectly in my iGig bag's front pocket with some room to spare. The weight is still manageable at 9 lbs. The RS210 is right in line with a lot of other 2x10's on the market at 45 pounds (on the bathroom scale). The RS212 weighed in at 51 pounds. Granted these cabs are not as portable as my Schroeder Mini's (@ 25.5 lbs each), however you get twice as many drivers. The question comes down to whether or not I care enough about the weight to make a decision based on it. Currently sound is way more important to me, and the weight, nor size, will not be an issue. Here is a pics for the size comparison: Value I agree with John W. in stating that the RH450 has a lot built in and this contributes to the higher price point. When compared to the less expensive amps in this class, the RH450 adds the tuner, tube emulation, multi-band compression, headphone jack w/aux-in (the G-K has the headphone out), digital out for recording, and the memory. All of these features I've been compensating for using pedals, so I personally have to consider this part of the equation while others may not. When tallying everything up, the TC price is equivalent to one of my heads, two cabs, and four pedals... each setup coming in between $2,200 and $2,300. For this price, the TC also provides two more drivers, which could prove big. Durability Of course durability is a measurement over time, so no comments other than the fact that the cabs seems very well-built. The head is pretty solid as well. I'm predicting it won't be an issue, but we shall see. Comparisons Freddels brought over his Genz-Benz and MarkBass F1 over to add to my LMII and G-K MB2-500. Considering the acoustics in the room, we were only able to comment on the most obvious things... * The LMII was more 'transparent' than the RH450. It also sounded really good through the TC cabs. * The Genz-Benz Shuttle also sounded great through the TC cabs and I wish I had more time to spend with it. I'm not sure how to describe this head when compared to the RH450... maybe Fred can comment. * The MB2-500 was more pillowy than the RH450, but still had great tone running through the RS's. * The RS210 and RS212 really performed well with all the heads, as did the Schroeders, but there is a lot to be said about two more drivers. I really wish I spoke as much 'amp' as others do here so I could provide more details, but the bottom line to me is that the RH450 is every bit as satisfying to me than the other heads we had at our disposal. Conclusion There won't be a conclusion until this rig is put through the paces over the next couple of months, starting tonight, however I really, really like it so far.