I am looking to replace a Shimano M151 crank. I want to get something that is compatible with the current bottom bracket, which seems to be fine (no noise, no wobble, little resistance).

How can I tell what I can use to replace the M151? Here is a link to the specifications:

http://techdocs.shimano.com/media/te...9830657743.pdf

The bike is a Cannondale Quick 5, bought in March 2009. I'm not sure if it is a 2009 or 2008.

Thanks in advance!