nighthawk wrote:
Get a PC with Intel Core 2 Duo CPU, 2GB or more RAM, and put it all on a quality motherboard like Abit, or DFI (with Intel chipset).
PC is 1000 times better than mac.
...I don't like or use a Mac but that is such a fanboy quote

also, I don't think OP is planning to build, rather to buy.
so all that said Nighthawk is right about the proc but mem now you'll find 3+GB more useful and honestly prebuilts now seldom have less than 3GB.
Just go to bestbuy and poke around, anything you get will be a world of improvement.