Try taking the fx for a test ride and see how you like it. Since you get 30 days to return the 7300 maybe you can ride it another week or so and try to figure out what about it you would change. Or take the fx for a few test rides, longish ones not in the LBS parking lot, and see what about it you like more than the 7300.

It does take a "while" (loosely defined) to know what you want or don't want in a bike. My LBS offered to buy back my 7000 at full price after I'd had it for 2 months because I wasn't sure if it was the "right" bike for me. It may turn out that you have more then the 30 days.

Q