Well, SLI Ready means you could use TWO cards instead of one, but one will work out just fine too, lol....
Anyways.. why are you going for LCD? Just because they look fancy? The normal screens has a whole lot better resolutions for less price, and plus I own three LCD's and sorry for the waste of money every single day lol.. I had to send two of them to fix like three times since i bought them in less then 1 year, they usualy have 'burned' spots which the warranty doesnt cover [burned meaning they are either permanently white or blue or some sort of passive color that never switches... its REALLY annoying sometimes.....]
I'm not saying all of them are bad, but they live less than a regular screen, cost more and has less quality.... just my thoughts though so dont come and flame me people.