Good luck Preach!
Computers are such a commodity these days. Personally I would only consider doing that if I really enjoyed it and had the time........or didn't sleep a lot....
Also, if you have component compatibility issues, is it possible tech support could be more problematic? Could one component manufacturer blame a compatibility problem on the other component manufacturers and not help you?
Also, will your software be more expensive if it isn't bundled with a plug & play computer?
That being said, it sounds like it could REALLY be a lot of fun!
Again, good luck and keep us posted!