Check out the Fender Super Champ XD. I've just bought one and love it. It has a digital preamp section, two 6v6 valves in the power amp and a 12AX7 for gain/phase inverter, plus limited but good-sounding digital effects (reverb, delay, chorus, tremolo and vibe).
As you'd expect, it's more focused on the Fender clean sounds (Blackface, Champ, Bassman), but it also has some good higher gain tones, including two metal settings.
Unfortunately, no effects loop or headphone socket, but the built-in effects might be all you need. Give one a try - you may love it!