I'm 5'4" and have the Trek 7.2 fx WSD 15". (short arms, long legs) I really like the fit and love the bike. It's perfect for commuting, or I take the panniers off and just head down the road for a ride. It's interesting that you can't seem to get one now. I ordered mine in September, was told they would start having them in by the first of Oct, and by the end of Oct, I was really getting impatient! I think it was the last week of Oct or first week of Nov when it finally came in, a few weeks after it was promised! Seems like they would do a little better on stock, time-frames, etc.

Have fun with whatever you decide. I'm really glad I waited for my Trek, though.