I hate to say, but unless he's running a 2GB radeon card, the 560SLI is much better like hellfire said. Radeon may put the display in for 3 monitors. But that doesn't justify it will handle all those monitors with 60FPS constant running Max settings and everything. You just can't do it on one card......Unless your running a 2GB card or say a 6970. a 6970 would handle it much better. but the 7870 will be a better option when its out, If you want one card. If you want everything all on one card.....either the 590 or 6990 for Max settings on a high resolution with complete Smoothness....Your gonna need a Dual GPU card for all that.
Now as for those that are gonna Reply and talk Ish about my post, how about reading it again and think about what i said. I exactly said for Smoothness with Max Settings. And yea he didnt state what game he's gonna play but i still say. Wether its crysis 1 from years ago or Battlefield 3 or Skyrim. Your gonna need a high end card if you want to be able to Max out for a while without upgrading. Plus it just can't be done with 1GB of Vram. You need more Vram than that with 3 monitors running a game. Now just desktop display, simple web browsing its a perfect card, I just like NVIDIA better.