Reading in custom PC this month, they were not impressed with a six screen set up using eyefinity. Apparently really difficult to set up, flaky drivers, way to big a viewing area and too expensive. They reckoned 3 was the way to go if wanted to dive into widescreen gaming.
I tried a dual head and it was good, but the bezel in the middle is really irritating. Triple head is better I think,
Cheers,Mark