Yeah, even if they are they're way worth it. The cases they use and the amount of work they put in each one is astounding. They don't use cheap steel cases with plastic attatched to it. Voodoo PC and Falcon Northwest computers are art and computing mixed together in it's best.
Voodoo and Falcon Northwest are both much much more expensive than Alienware. I tried building the exact same computer on all of them. The Alienware added up to $2,675, the Voodoo $3,410, and the Falcon Northwest $4,000.