Im gettin a GU booster but just as long as it fits and its a good make then you cant really go wrong, its mostly your choice on looks. Id recomend tarty, theve got loads.
I think ZOO! and Onza carbon riser bars are the most comfy, oh and not to mention monty Ti bars ( also comfortable ) ma mate has loads of problems with his wrists and has found the Ti bars to be most effective. personally i would say ZOO! riser bars are the best