Viva the lightweight revolution! Gotta love a 900W tube amp that weighs 6.5 lbs! Now I'm looking for the ideal cab(s) to go with my awesome new Genz STM 900. I'm at the gear paradigm crossroads. I play primarily rock of different flavors, fingerstyle and pick with occasional slapping. The main reason I chose the STM over comparable featherweight amps like the TC RH450 is the girth of the sound and the ability to drive the tubes to overdrive. I use quite a bit of drive in my sound at times, to the point of "full face melt," as Ed Friedland put it in his review of the STM 900. I like a pronounced upper-mid grind and some aggressiveness in the highs. But I also like to be able to tame it down to flattish hi-fi tones. I play active 5-string basses with pretty hot output. I have to compete with loud guitarists using Mesa Boogie and Peavey 5150 amps, and loud drummers. My other criterion is weight. I'm not into the 100 lb 4x10's anymore. Just sold my Eden D410XLT. I want a loud, lightweight cab that can grind. A one-cab solution would be awesome, but a modular rig that would be scalable for different sized gigs would also be great. I already have an 8 ohm Avatar 1x15 neo with tweet (which i turn off because it's crap with overdrive). It's nice and lightweight, but I'm not sure the 15" sound on its own is right for me. I might keep it and add a 2x10, or if I find the right one-cab solution, I'd get rid of the Avatar. Right now my candidates for the one-cab concept include the Epifani UL-310, Schroeder 21012, Accugroove Whappo Jr. I'm not really looking for a polite upper-mid and high. I see a UL-310 on Ebay for about $550, and that seems like a great deal if it's the right cab for me. My concern is that it might not be loud enough at a loud outdoor gig--I've heard the low B can fart out on the 310 if you push it very hard. Another option is to go with 2x210's, or a 210 & 212. I've been hearing good things about the TC Electronic RS210 & 212, and they're lightweight, inexpensive and stackable. But I also hear the 210 is pretty polite on the top end. And some say when stacking cabs it's important to stick with the same size driver--i.e., 2x210, or 2x212--rather than mix driver sizes. What about a lightweight 4x10, like a Schroeder 410L? What do y'all think? Any input is appreciated.