Hello all. I wonder if anyone has an opinion on an issue. There are apparently 2 versions(part numbers) for the MacBook Pro 2.16ghz 15.4". MA466LL- uses 2 512ram cards and MA601LLA which uses a single 1gig ram card. Is there a reason why I would not want the two 512s other than expandability? Was there a difference or issues with the older model?

Thanks in Advance,

J