Picking a motherboard should actually be one of the LAST things you do. The CPU, RAM and video card are basically what determine the performance of the system -- the motherboard is just the vessel that holds it all together. So decide the other components first, then find a motherboard that's compatible with what you want to do:
1. Pick a CPU
2. Decide on which RAM you want
3. Decide whether you will ever want to do Crossfire/SLI
4. If so, figure out which actual graphics card(s) you'll use
5. Decide whether you need USB 3.0/SATA3 support
6. Make sure all of the above will fit into your budget
... and THEN pick a motherboard. There will be one that fits just about any possible combination of the above.