I build my own. Been a hobby since PC's first came out.
Get this book by Scott Mueller. Upgrading And Repairing PC's.
Its fantastic and covers every single aspect of PC's. Its a big book with 1,574 pages, but you'll find info you never knew in there about all the components that go into making PC's work from A to Z.
Que Publishing has more info here.
http://upgradingandrepairingpcs.com/
This is a must have book if you love building your own PC's.
