68mm English thread BB Recommendations

dude transmission database tells you what other people are riding and what works so you can then make a decision about what yours should be, and means you don't buy the wrong thing.

http://www.londonfgss.com/thread3372-4.html#post628030

The two cranks I've mention above aren't there (from what I can see).

Miche Primato Advanced Track Chainset look ok. How do I know if I need 170mm or another size.