Yeah start wtih AMD or Intel? I have bought several motherboards and my best advice is buy a mobo that will do everything you need, now and in the future, but nothing more. I mean you have to really think about it. So if the next 'best mobo' is only $20 more, it may be worth it just for the little extras, but at some point you have to stop. For example at one point I had an Ultra 790i, the thing would go tri SLI and REQUIRED DDR3 RAM,but I never planned on doing that. But there are a couple of advantages to that board.
I currently have a NForce 750i SLI FTW and I have to say it ROCKS and does everything I need.