Looking at buying the new vid card but looking at two choices 5770 x 2 or one 5870. From what i have been reading the 5770 Xfired can beat a single 5870 in most benches and its cheaper for two of them then one 5870, where one 5870 no running into any Xfire problems. Which way would you buy, Im running a 4890 right now would even going to a 5850 be the same or an improvement?

A 5870 will destroy two 5770's in almost every game. A 5850 is only MARGINALLY slower than a 2x5770 combo.

You will benefit from buying the higher end card and crossfiring it in the future when prices come down