The hardest part was plugging in all the wires - I had friend help me with that because that's one thing you don't want to screw up lol
Wires coming out of the case - wires out of the power supply - you will dream about wires
It's not that hard, considering the plugs are designed where you can really only plug them in where they belong. Glad you have a decent amount of cash to work with.
Check out this article, it came out last week. http://www.tomshardware.com/2007/09/17/sbm_low_cost_system/
and you can read the other articles as well, it'll give you a good idea. If I were you though, I'd wait till after nVidia releases their new chipset for motherboards and intel releases their new processors and their new x38 motherboards in mid November, then decide and build. Those parts that are going to be coming out are quite a bit better than what's on the market now.