Re: best amp for clean sounds
I'm in good company, as they're Seymour and Lew's favorite amps too, but my vote is for the blackface Fender Pro Reverb, whether it's an early one or an overhauled silverface. I'm also a believer that their original speakers are inferior to modern speakers. So, take an old handwired Fender, put fresh tubes, caps, and the best speakers available today, and you'll have a tone that's possibly better than vintage amps and reissues.
I have a 74 Pro Reverb that was owned by Aspen Pitman, sold to his cousin, then sold to me. It been blackfaced, retubed, and has an Emi Swamp Thang and Jensen C12N w/beam blocker. I've put it against the best clean amps, and this Pro Reverb just rules. It's crystal clean up to about 4, where it blooms with natural tube breakup that's smooth and beautiful. It engulfs the room with huge 3D tone. It's reverb and vibrato is gorgeous sounding as well. I was playing it tonight with my new T Rex Replica delay, and it was something to behold.
My other "clean amps" are a 97 Matchless Chieftain and 98 Gibson Goldtone GA-30RVS. The Matchless is my favorite EL-34 clean, and the Goldtone is like a Vox AC-30 that sounds a little woodier than glassy and it has amazing stereo reverb.