My opinion only, but SLI and Crossfire are becoming increasingly irrelevant. Unless, of course, you have a very large monitor, like 28"-30". I have a GTX 275 and it powers either my 22" widescreen or my 24" widescreen more than adequately. When DX11 comes out and some companies actually release some titles which are more graphics intensive than what's currently available, maybe SLI/Crossfire will be needed on smaller screens again. Will have to wait and see to answer that question.