On Suntour Superbe Pro cranks, do be aware that they just aren't all that stiff compared to a Dura Ace 7710 or a Sugino Super Mighty. While the Suntour is stylish, I'd actually recommend you look at the 7710 or Super Mighty. I've had nothing but good experiences with both of these. The Super Mighty gets something like 25 drop forging steps (compared with about 3 for the Sugino 75), which you can actually see in the edges and back of the crank, but it makes it ferociously stiff and durable. And it fits all the Hatta and Sugino tapered-spline bottom brackets, or a Phil Wood if you're so inclined. I like a lot of Superbe Pro equipment, both road and track, but the cranks just aren't as good as the rest of the line.

Edit: Sorry, my sloppiness. I was referring to the Sugino Grand Mighty.