the gigabyte boards especially the UP and UD series have quite the track record of being much better built than other competitor's boards at varying price ranges, so OP made a good pick. also, OP's 5870 might sag in the latest titles even if it is at 1080p. the 5870, when it was new, traded blows with the gtx 470, and was beaten by the 480. now as we know niether the 470 or 480 are able to manage the heavier titles at maxed. so if OP wants a do-all card, the 5870 is not the answer anymore.
The boards digitalarts linked are viable options, but if you want the best one for your money, gigabyte is pretty much unbeatable. when the UP5 was new last year, it was reported in a [H] review that it was able to reach higher levels of frequency at much lower voltage over the Maximus V, and also higher build quality levels, which is quite the achievement seeing as it is a considerably cheaper board
sorry, digitalarts. no offense intended
short addenum: Giga's mainstream chipset boards are awesome. however their X79 boards were all garbage and a giant dissapointment. I had to go to an Asus P9X79 WS for my 3930K build instead of a X79 UP5 which was a bummer.