George: 

Here's a list of all Titleist Advanced Fitters in Minnesota:
http://www.fittingworks.com/FindAFitter.aspx?search=fitter&tab=1&address=&city=&state=MN&postalcode=&submit.x=40&submit.y=4&radius=50

Your Titleist fitter will be the best person to help you decide between the AP2 Irons and the CB irons. But for more product information check out all of our irons: http://www.titleist.com/golfclubs/irons/default.asp

TEAM TITLEIST

If the Advanced FittingWorks Centers are not close to you, please give us a call at Team Titleist - 1-888-TITLEIST and we will be glad to find a fitter in your local area.

Earlier, we talked a little about differences in the AP2's and the CB irons.  Here is a partial from several of  the postings:

710 CB's are MORE of a players iron compared to the AP2's.  They do not offer as much forgiveness, focusing more on workability.  If you are not a 10 handicap or lower, the AP2's might work better.  You may need to work at the range a few times a week to be able to consistantly hit the 710's.  The CB's work for the player that is looking for more forgiveness than the MB's provide.  They are the cavity back companion to the muscle backs.  Players that liked the ZB's or the 735's and want to move into new sets will find the CB's a good update. 

The AP2's are the forged version of the AP family.  They are more forgiving and a little more offset than the CB's and will also hit the ball higher.  The progression of the four iron models in terms of forgiveness and workability from most forgiving to least would be AP1's, AP2', the CB's and then the MB's.  There are many variables that go into selecting an iron that would work best for you.  I would check with your local pro to see what he/she would recommend or give us a call and we can find a fitter for you.