How bad will those cards struggle with 3x30's? Even worth it? Only reason I even ask is there is a set of 5770's on craigslist http://cleveland.craigslist.org/sys/1567824879.html nicely priced. I know they are equivalent to one 5870 but being a user of 30" LCD's and gaming at 2560x1600 I know that resolution is very taxing (gaming) let alone 7680x1600 