Re: Practice combo recommendations
The first amp I can think of that covers all the bases you're wanting, and is easily available, is the ValveKing 112. The only draw-backs I can think of with it are that the gain isn't going to be as over the top as that of an Engl or Saldano,(nothing a decent distortion pedal can't remedy) and there are a lot of quality issues with this amp, from what I have seen. I see this amp come up on Peavey's forum often with complaints of it going belly-up after a short while. Hit and miss on quality control but it is a fairly inexpensive amp anyway. They make a blue million of these amps, so it's not like you couldn't get it replaced easily. Then again, I have a friend who has had one of these for years and never had a problem.
I don't have any direct experience with the 6505+ 112 but, if it's circuitry is essentially the same as all other 6505 models, you can count on two things: Very little wiggle room in the clean channel before it starts to overdrive a bit, and a lot of hiss. Quality, however, shouldn't be an issue. They're well-made amps.
Others that come to mind easily: There's the Fender Supersonic 112 but it only has a single input. Marshall JVM205C - once again, single input but everything else you're looking for.
Outside of that, for just practice at home, I'll have to side with the other folks and suggest a hybrid modelling amp too. The Line6 Spider Valve amps are great for what they do and also have a power amp in/preamp out,(loop). Bogner Alchemist and Peavey Vyper,(tube version) are comparable as well.