It really depends upon the conditions of the day and how I'm playing. If I'm feeling salty and the conditions are firm and fast, I will go as far as 7400. Normally, though, around 6800-6900 does the trick on a par 72 track.
1. Southwood Golf Course, Tallahassee, Florida. 6650-ish par 72. In mid-summer I might try the near-7200 set, but not in February.
2. Highland Country Club, Indianapolis, Indiana. 6551 par 70.
I will move up on some tees as well, usually on the par 3's. The par 4's and par 5's are usually manageable, but the tips on some par 3's are too hard for me. As an example, I moved up a set on #3 and #12 at Old Mac when I was there in November, as both played into the winter wind. A 236 yard Redan into the wind is a bit much!