Also, if you want to save your back some trouble (Twins are HEAVY!), look for a Dual Showman Reverb. They are a Twin Reverb in a head cabinet. Then you can just pick any cabinet setup that you like (preferably at 4 ohms impedence)… They were introduced in ’68, however, so they only come as silver-faces…
Are you sure that you need an 80Watt, loud as hell, heavy as hell tube amp? If you’re willing to go smaller (which I definitely recommend), I can make some suggestions. My favorite amp, that I use when I gig, is a ’68 Deluxe Reverb, which rate around 22Watts. Granted, I like to crank it to where it breaks up just a little (I rarely play with a completely clean sound)…
The Bandmaster and Bandmaster Reverb (as well as Pro Rev., Vibrolux Rev., and Super Rev., if you can afford them) are excellent choices in the 40Watt range that will most likely cover most gigging situations you’re likely to come across, while being loud enough to hang with a drummer during practice…