yeah i wouold go with a good full suspension design, the good designs are more efficient in my view anyway, i ride a hardtail at the moment and probly will keep riding one mainly cause i think its more fun, theres more skill involved (not that i have too much of that lol but oh well) its not just ride over anyrthing and you get away with it, hardtail ya have to pick your lines more carefully and everything, i find it more interesting but for a 24 hour race i would rather something a bit more comfortable. im going to get a Giant Trance once they come into the country (late this year)