I'm learning my way around the mechanics of bikes and learning how to wrench on them. I just ordered the out of print 2012 Kestrel Airfoil Pro because it closely matches the optimal stack/reach measurements that I was fitted for. The bike I ordered comes with 172.5mm cranks and my fit calls for 170mm cranks though, so I'm wanting to change those out. I know there are several styles of bottom brackets out there and I'll need to order the correct crank arms for what is in the bike. The spec sheet simply says the bottom bracket is an Oval Concepts Integrated bottom bracket. How do I find out what bottom bracket I have and what cranks I should be ordering?

Any recommendations on decent cranks would be good as well. Eventually I plan to upgrade to some power meter cranks, but not yet...so I don't want something super spendy on the cranks, just something good. I do plan on putting some rotor Q-rings on whatever cranks I get.