I'm with Gearhead on this. The 18 watters are the best amps in the world, however, they are a bit in-your-face, think Beano Album. Another option would be a Fender 5E3 (tweed deluxe), it will be a lot easier and cheaper to build than the Deluxe Reverb, only pushes about 12 Watt with a NOS rectifier with a pair of 6V6 tubes, gives smoof overdrive and cleans up beautifully. My source of info: I have built both and love them to bits.
5E3 build:
http://www.guitarforum.co.za/amps-speakers-and-valves/new-(f3nd3r)-amp-kit-day!/
18 watt build:
http://www.guitarforum.co.za/amps-speakers-and-valves/one-small-step-at-a-time-or-my-18-watt-marshall-build/
Also, the 18 watt amp, without attenuation or power tube voltage regulation is stupidly loud, even with Greenbacks. The 5E3 not quite so much, if you use the Jensen style speaker, mine is a Weber 12A125A.