Get it.. if you don't like it, you can "run it through" with your impaler I've heard good things about the VAmps..
One thing you have to remember, at least in my experience, is that the sounds on the modeling units are usually best for the high gain patches.. where I think they are lacking is in that very specific area of tube overdrive, where that perfect grit and grime can only come from a tube amp.. but when you're talking about a mesa triple-rect patch or some insane-gain thing, you don't have that issue. I'd say you could make that head as brutal as you want to. Given the style you play I can't imagine you would be disappointed.
The ONLY thing i would worry about with this amp is the power.. 2x60 isn't that much in the solid state world.. It should crank plenty loud but you'll want to run it through a soundsystem if you play out where I would think.
I saw a VAmp rack on ebay the other day go for 120-130 bucks.. the other option is to get the rack module, get a 300-watt or so power amp and a couple of mid sized loud speakers and you're set.