Originally Posted by
KeyboardDemon
I do remember reading an article that compared three UD mobos, I think it might have been on the Z77 or Z87 chipset but I can't find it now. However the key point to note was that the UD5 didn't overclock much better than the UD3 the only difference between them was with the features as the UD5 had more of these, such as better integrated soundcard and SLi/Crossfire support.
Check out the features, pick from the features that matter most to you and then decide based on that rather than assume that the more expensive models will automatically get better results.