Update:
Mine came with the STR-447's. It's a Deuce head.
SilverWulf,
The cleans are very good. To me atleast. I also thought that the clean tone in a Dual Rec was great also, while some think it sucks. For me it's great though. Even though there is no reverb, it really seems like there is with this amp. The clean and crunch modes on the 1st channel are very shimmering. Don't think I'll really really need a reverb pedal with this amp.
As for tight defined heavy rhythm, I don't play hard metal, so I'm not too sure. But the dirty channel and it's modes are very nice and have a lot of clarity also. You can get a good hard rock tone for sure. Also, with the different power select settings, and rectifier choice for each channel, you can get a wide array of tones.