The real question in this is budget. If you can afford it, I know MANY professional drummers (the best in the world) who own Roland V-drum kits of one variety or another. Most of them use the kit to trigger MIDI notes that feed a computer based sampler where they've created their own libraries...by that, I mean they've taken expertly recorded samples of their own drums and built a "triggerable" kit. I've recorded hundreds of sessions with drummers who will play their V-drums when space doesn't allow for proper isolation for other instruments. The sounds aren't quite as good as well-recorded acoustic drums, but they're adequate for the purpose. In those cases, it's almost always demo stuff anyway. (I've never had a drummer whose actual performance was less than awesome because of the V-drums)

I'm not a drummer, though, so take my opinions with a grain of salt. I AM, however, a professional audio engineer and I know a thing or two about what sounds good. The stock sounds in the V-drum systems are pretty good and very versatile. They've been around for quite a while and many iterations have come about, so you can probably score a pretty good setup for far cheaper than retail if you dig around. One friend just bought a 9 piece setup as a spare for around $400 from craigslist.

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How many debunking threads do you have to participate in before you start getting your shill checks? I'm saving for an Xbox.

I also saw Joe Newman demonstrate his car in 1987. It was impressive...I was in the 7th grade. Then he went nuts. I went back to school.