People really like Rampages, Kryptons, Full Tilts, and the Salomon SPK boot line. Each boot is a really different style and fit, so it is really best you go to a local shop and try them on, and when you find the one you like best, you get a custom boot fit. Buying boots randomly online is risky business.
Your best bet is to do what you're doing, gather some info on popular "freeskiing boots" and THEN go to a store, have a general idea of they style of boot you're looking for, and go from there.