Yeah, it's HUGELY valuable advice - The one thing a modeler has over a conventional amp is
extreme flexibility and programability.
(the thing a conventional amp has, of course, is tone and response

)
To get you ballpark, Vai relied primarily on a Bogner Exctacy for that album, but that one sounds more like it came from his DS-1. So, does the V-amp offer pedal models? (I've never used one). If so, take a clean-ish marshall and add a DS-1 out front for your lead patch.
The problem here, though, is there's a LOT of
power amp compression on that one, and most modelers don't allow you to adjust this. Basically, if you want that tone, a nice low-wattage clean
tube amp running midway or higher and a DS-1 will get you a lot closer - try a Fender Blues Jr. for that clean sparkle, and a DS-1 in front. That'd be my recommendation on a budget.
-D