Why not get another BB30 crankset? There are several options now that aren't FSA, such as Cannondale's proprietary cranks, SRAM, Specialized, etc. Once you put the threaded insert in there, it is a real pain to remove if you ever decide to go back to BB30. I really like my Shimano cranksets, but I think if I got a BB30 frame (my Specialized framesets came threaded unlike their complete bikes), I think I'd stick with a BB30 crank.