I visited my Trek dealer here and rode a 7.7FX (they did not have the 7.5) and also a 7300. The FX was very impressive, the most responsive bike I have ever ridden (maybe too responsive). For my own reference I wanted to try something a bit more upright. The 7300 was much more to my liking as for seating but riding this right after the 7.7 it felt not as responsive but I liked it. The dealer said going up to the 7500 would have some better & lighter components. I also liked the seat more than the seat on the FX. I am hoping to decide on something in the next 3 or 4 weeks. Any suggestions on bikes from Specialized, Cannondale, or Gary Fisher that would sit like the 7500 that I could compare? Or just go ahead and get the 7500.