I have decided to try a 160/70-17.....
My CT has turned into my highway touring bike, so a super-long range, highway tire is what I am looking for.
I have Michelin Commander II on the way for the rear. I have read review after review and these guys have such a strong following. .......Great in the rain and very long lasting.
I haven't decided on the front yet........ The MCII doesn't make a perfect fit.