Triple is good! Go for triple! Sooner or later if you decide to take a long trip or just riding them hills you are going to praise your triple crank. I almost never use the granny gear (smallest ring) but I sure was glad I had it when I rode for metric century, to set new PR in distance and not in time. When really tired a triple is great or when carrying heavy loaded panniers or just going for them hills.

Go triple!