I noticed a couple votes for the Fender Princeton. I did some clean guitar tracking a couple of weeks ago. The guy brought 4 different amps and we put them all to the test. Ampeg 501, Fender POS modeling amp (can't stand any sounds from these contemporary modeling things, at least not yet), Fender Champ (don't know the year, but old combo), and a borrowed Fender Princeton (late 60's/early 70's) head with a simple channel and a tremolo channel. Hands down the Princeton won (the heads were run through a strange, but good sounding, home-made 4x10). It simply had the most deluxe, silky, 3-D sound (especially the 3-D aspect, the difference was unreal). We ran the simple channel because the tremolo channel was busted somehow.
We used an old SG with original P90 pickups, a modern Chinese Strat, and a Robin of mine. They all sounded great on it, and we used different guitars for the different tones we needed for the songs. There are a couple on ebay right now around the $300 range. If I had the extra $$$ I would get one today.
Oh yeah. There were some distorted guitar parts. The Princeton driven with a Sebatron VMP (in the DI, line out) was instant Pete Townshend. The guitarist, who normally uses a Roland all-in-one multi-switch stomp box for all his tones, quietly said "oh my" and got really quiet for a while. Too bad I didn't have access to a Sovtek Mig60. Dimed it would have made him weep for all the wasted years.