I'm using an 11-32 cassette with my compact. We've got some big climbs, 2700' in 8 miles or less with some steep pitches. I'm finding with the 34-32 combination I can sit at 10% which is essential to get up these grades. Frankly, I'm thinking of an 11-36 if I'm doing a long ride with 2 or more long climbs; you can't be too proud when you're on the "wrong" side of 60