Have a look at P6X58D-E which is cheaper and has pretty much the same specs.
Also motherboard doesn't make a noticeable difference in gaming,so as long as you have a good CPU/RAM/VGA you can run WoW and SC2 fine.
If you've not already bought the CPU and are not too much bothered with triple/double channel memory, then plan on going for a P55 (LGA 1156) system.. They'll have lesser number of slots (hopefully to your satisfaction) and are considerably cheaper.. Both platforms would perform similarly for a single video card setup..