WOW, there are soooo many good ones out there and you didn't give any price restrictions:
1)For the best cleans, it's hard to beat Fender: Blues Deluxe Reissue (Clean is not quite as pristine as other Fenders and the "drive" doesn't have a lot of crunch @ lower volume unless you put an inexpensive volume box in the loop), Deluxe VM (w/ lots of OD/crunch...it's hybrid) or Supersonic 22 (I'm having GAS for either this one or the Bandmaster VM which is the head version of the Deluxe VM).
2)Other good choices: Peavey Delta Blues or the Classic 30, Blackstar HT 20 or HT40 (the "drive" channel may give more distortion than you care for, but a single tube change of the preamp tube to a 12AY7 for the drive channel gives lower useable gain and still retains loads of hi-gain; the clean is quite clean, but not as pristine as Fender's).
3)If you have an opportunity to try out an Ibanez TSA, it may fit the bill depending on just how loud your drummer plays. It is 15 watts, but is quite loud IMO, has a loop, and a built in TS9 circuit that acts as the dirty channel. Also has a boost function. If you like it, be sure to get the optional footswitch (chnl and boost). The clean is very clean, and the Dirty is an actual TS9 circuit. I find it loud enough to suit me, but I have the Head version driving a 2X12 cab. When others play so loud that it isn't enough, I would just as soon not play as it's hard on one's hearing.
Sounds are very personal choices, so if possible, go to somewhere like a Guitar Center and test drive all you can with a guitar that is similar to the one you use. By all means, let us know of your choice.
