I used to have a Voodoo, but I had to sell it about six months ago. My advice: don't buy a HeXx. When I was looking for a new SLI rig though recently, they were my first choice. Unfortunately, I didn't want to wait 40 days and pay $1000 more for the same parts as the ones I got from Velocity Micro. Though I do think that maybe half of that money is justified for the killer case along with the outstanding customer service and support.
By the way, there are a lot of people who own Voodoos. I read a post on their forums yesterday that said they needed four DHL trucks to pick up all the computers that shipped yesterday. Obviously, they're selling quite well.