I have a black Pake crank which is nice. Also, on Benscycle.com there is a 144 bcd Andel crank for 100 that looks really nice. Also, there is a SRAM crank w/ BB for 100 bucks. All of those are good options. I don't know what spindle length comes stock on the TT, but you might not need a new one. Just do some research and everybody will tell you what size spindle is recommended for the crank.