Universal Sports had the 4x race yesterday and now I really have the bug to build one of these things., there's so many options out there, Id like to build something that could do double duty from the bmx track to the local mtb trails, any ideas? Im leaning towards full suspension..

I absolutely love my BlackMarket hardtail. It is my favorite bike, and I ride a lot of different bikes. As for you, depends on the type of 4X course you have. I'd hate FS on a bmx track (and I think you would too). Good luck.