If you have about $1500 to spend, then I wouldn't worry much about it. I only spent around $600 to build my own PC and I got basically everything that I really needed. I could have bought better sound cards and video cards though, but I don't really need the high end stuff right now.
Anyways, I would recommend Asus mobos. Thats what I was recommended, and thats what I bought. They are also good for overclocking if you ever decide to get into it.
One tip, take your time, because you will always find a good deal out there. I saved over $150 dollars on a very nice Asus mobo, AMD 1.4 processor and an IBM hard drive. Thats a lot of money for me. ....Wait, you have plenty to be worrying about that.
