The following is with my new Zotac GTX 560 Ti 448 SLI
By bumping the voltage up 75mv I was able to achieve an overclock to 900/2100 on these cards. The cards do tend to get hot during benchmarking, hovering right around 80C in a 73F room, but during normal gameplay in Battlefield 3 they sit happily around 65C (this is all with 75% fan speed).
Battlefield 3 with Ultra settings and 2xAA runs at a locked 60FPS under any condition (v-sync enabled). This is the card combination I have been waiting for. They cost me $398 on ebay together. Rippin' deal. Here's a screencap of my 3dMark11 results.
This is with my i5 2500k @ 4.4GHz, 16GB of G.Skill Ares 2133 (at 1600), on a Gigabyte Z68X-UD3H-B3 motherboard. Pretty raunchy results.