Re: Amp shopping time...
The DC3 uses EL84's I believe which give it more air and sparkle, but not as much bass. The DC5 uses 6L6's which give it more low end muscle. They are about the same loudness, but slightly different tonality.
I also wouldn't over look the later DC2 Studio Calibers. They also use EL84's but with the lower watt rating, you can push the power section a little more, for a fatter sound at lower volumes. They don't have the graphic EQ, but I don't think it's a must have on those amps.
The DC2 was my first amp. I paid $750 for it new, gigged twice a week on average for 5 years, and sold it for $500 with the tolex completely trashed. I only had to retube it once in that time. That was one amp, I would never hesitate to recomend.