Making a PC!

OK, I think I’m going to get a new PC but I really want a kick-*** one. But basically, I need some help from you guys as although I know making your own PC is the way to go, I’d like to know where everyone thinks is the best source for the components.

First of all, I’ll be using some video editting software so a decent graphics card is pretty important (plus I wanna waste work time playing games!)

So what would you do if you were me? Is it ebay, or dabs.com or what?