Get a Dell or Dell refurb if you are not very technical. They are cheaper than what you could build because they get their parts so much cheaper. You will also have a warranty. If you want to build one yourself I can put together a list of parts and where to get them.
Catching on fire doesn't, but overheating causing artifacts and lower performance does happen quite often if you game for a couple hours on stock cooling.
Don't just throw out false information because they are the newest and highest numbers. Less than 10% of games utilize both Dual Core and 64-bit technologies. You would also need Vista 64-bit edition to enable the 64-bit extension, I don't recommend WinXPx64 because lack of driver support. The Intel Core 2 Duo chips are the best for gaming right, they took AMD's crown. THey are not the best because of dual core, but because of the great technology, games will most likely not even use both cores.
LCD's highest resolution is nowhere near CRT's highest resolution.
I bought 2 refurb'd mobo's from newegg, 1 was absolutely brand new (I think it was just open box), and 1 was just the bare mobo. Drivers are free and you don't need that plate.