You guys should build your own. Its a great project if you have kids and the hardest part is managing the wiring so that your system can breath. Seriously. It was a lot of fun for my kids and I to build the one we have. Fry's sat the chip for me because I didn't wanna screw with it and off we went.
Lotta fun and NOT difficult. If you can ask questions and use Google, you can build one...and I real good one.