I have the Rockerverb 50 (6V6's). Great amp: nice chimey cleans and the four gainstages on the drivechannel go from light crunch, to SRV, to classic rock, to heavy rock and eventually metal, although the RV is not supertight. I like the Thunderverb too, which has an attenuator on board. The TH-serie has imo to much fizz on the drivechannel. The OR15 and the Dual Terror are good amps in a small package.