ati's latest card,

http://www.ebuyer.com/product/140437

supposed to be very good in crossfire form, as apparently crossfires way more stable then sli.

i'm going to be running a 3rd screen which will be at leat or over 24" but first i need to figure out how i'm going to run it

this looks interesting

http://www.ebuyer.com/product/132283

tho nvidia has reviewed a quad card also but i'm not sure when thats out