Single 8800GTX?

[mendriel]

Hi gang,

I've been shopping for a new laptop and have an option for graphics that I'm unsure about. It'll cost me about $850 for dual 8800M GTX 512s or about $250 for dual 8700M GT 256s MB's. Would I see a lot of difference going with the 8800s?

Thanks,
Andy

edit: Thought it was a single 8800.