As I understand it he's used a whole bunch of different amps over the years, Marshall, Orange (Matamp), Vox and Fender. Guess he's living proof that tone is in the fingers, and not just the equipment.
If you want something suitable for home and gig use, how about one of the Mesa Boogie Express models?
The 5-25 is EL84 and can be switched from 5 to 25 watts (hence the name). Alternatively there's the 6L6 powered 5-50, which will go to 50 watts.
I haven't tried the 5-50, but I almost bought a 5-25 before I got my Cornell. Beautiful sounding amp, and very versatile. Would certainly get you in the right area for Peter Green style blues.