my native rez is anything up to 2048 x 1536 cause I'm using this older (and friggen heavy) badass 22" flat-CRT
Second monitor is a 19" that goes to 1600x1200. The second monitor might get replaced with a widescreen LCD at some point, but that's a ways off.
The reason I'm leaning toward the 5870 is cause of it's 256 bit bus and 2x stream processors/transistors vs 57xx. though the 370-410 price point keeps me looking at that 5770