So I went back to the store with my G&L to A-B the SVT3 Pro and SVT4 Pro once again, and this time I brought my brother (who is a recording engineer and knows better than I do what to tweak in order to find pitfalls and such in a piece of equipment) We started with the SVT 4 and went through all it's levels, adjusters, contours and volumes. No holds barred, shakin' the crap out of the store. Lots of headroom, good onboard compressor, good sound from the eq. The EQ sliders have a longer travel than the sliders on the SVT3, which means you have a better chance of hitting a sweet spot. Same range, though +/- 12dB. The Limit Defeat switch on the compression opens up some extra room at the top as well. All in all, a very good package, quiet electronics, lots of useable features. One thing that isn't great about it is that when you press the Lo, Hi, bright switches, it causes some noise in the circuit. Not always, just when you press the buttons, a slight "pop" or "crackle" SVT3: as soon as we plugged in and started playing a bit louder, you can feel limited, like your face is up against the ceiling and you can't go any higher. And when the amp starts struggling, it doesn't sound as good anymore. The Tube Gain knob is a nice feature, but it has no compressor. Comparing to the SVT 4, one can feel very trapped in what it can do. But it still is a very good amp, but it may not be the best choice in our musical direction. My brother plays stereo'd half stacks, a guy that screams his head off, and a drummer that's all over the place. So SVT 4 Pro it is for me. I was going to pick one up yesterday, but that store location didn't have one in stock. The salesperson that was helping me out last week recognized me and for some reason thought I was looking for a bass, not an amp. He seemed very confused as to what whas going on that very minute. I asked if he had that amp in stock, he said he'll check. He returned and said they have an SVT 450...but that's not what I wanted. He said he'll order one and disappeared. He then returned with another customer and started plugging in an acoustic guitar... This guy's on crack! so we left. If I go back to that location and order one, I'll give the sale to a young girl that works there, and started asking about my G&L, saying that they had one a while back and that is an awesome bass. I'll go in and head straight for her. But I don't need it right this second, I still have the 200T to play around with. I'll see how it sounds when I add a new 4x10. We also tried a BR6 (I think it was) and I didn't like it at all. Noisy electronics and you can hear the cooling fan. Sounded like a vacuum cleaner. Also tried a Mesa Boogie head and 4x10 that was on display. It sounded phenominal, probably had a lot to do with the 4x10. The 2 were probably engineered for each other. It may not have sounded so good with another cabinet. But for a price of $1599 (head only), it wasn't THAT great. Not sure if it was on the fritz before we got there, but 10 minutes into playing, it started crackling and spitting...We didn't do anything harsh, just adjusting the Midrange when it farted. Maybe that's why it weasn't plugged in, we had to steal a 110V cable from another amp.