Originally Posted by MatrixEVO

Get 4GB. For one, it's an even number of memory, and an even number of sticks, whether it's 2 or 4 of them, your computer will like that better. Secondly, future games are taking a lot of memory, and so does Vista, so it would be worth getting the 4GB just for that. Check out Newegg, they have some great deals, and check out the mail-in-rebates as well.