These are 170 50/39's:
http://www.ebay.com/itm/FSA-SL-K-Car...item43b3448951

These are 175 50/39
http://www.ebay.com/itm/FSA-SLK-ligh...item337bd56916

These are 170 50/39
http://www.ebay.com/itm/FSA-SLK-ligh...item337bd56916

Here is a listing of new green SL-K's in Seattle. It looks like FSA has a lot of 52/38's coming out. I'd be interested in trying gearing like this.
http://seattle.craigslist.org/see/bik/3249443242.html


I have upgraded just about everything on my bike. The best way I have found to do it is buying a bike with a set of cranks, groupset or wheels that I want for a great price. Swap parts and sell the bike for the same amount or sometimes more than I purchased it for. It takes a big outlay of cash for a couple of weeks or so, but it's kind of cool looking at my Hollowgrams and knowing I actually made $400 on that deal. Plus I enjoy it. It gives me a little project. Some guys build birdhouses.

Have a peak at this. You would be surprised how low they will sometimes go. Throw out an offer of $1500(he doesn't list the cranks, make sure they are something you want). If it is really a CAAD10-1 it has RS80 wheels on it too. If you could get it for that much, swap everything and sell it for $1000. You will have Dura-Ace, SL-k's and RS80's for $500.
http://portland.craigslist.org/wsc/bik/3244557910.html