I have a tone blaster full stack and it looks great, but I also own a line 6 flextone 2. The tone blaster sounds good clean, and also on crunch setting (Clean with the boost on) but the distortion channel sounds a bit crappy. I've thought about using a valve driven
distortion pedal to boost that channel but I'm not too sure what to buy.
For the price (£599 I got mine for) I think it is excellent. you can buy smaller better sounding amps for less though (Don't ask me to think of any because I can't)
I'd say shop around, try one out. I like mine, I'm more than happy with it.