Hmm.. I think you need to do a lot more test riding.

I would go and try a larger Specialized bike, and maybe a men's bike. If you can get to Annapolis, Capital Bicycle has a good selection. If you're worried about going all the way out there for nothing, call first and ask about availability. They don't have a big test area, but they do have a good fitting area where they can some measurements while you're on the trainer and give you a good idea of what kind of geometry you need.

See what other brands you can find with WSD bikes, like Cannondale, Orbea, and Blue (Blue has started making a WSD bike for 2009, but their supply is low right now). You might need to come down to the DC area, but I think it'd be worth the drive if you can find a great fit. I know my sponsor shop in DC has a 52cm Ruby kicking around. There's often a big selection of lower end ($-wise) Treks at the shop next door if you want to try some more. Once you find the right bike, you can then see if a shop closer to you can order it for you and then you can take advantage of some free service deals from the closer shop that come with a bike purchase. But to start, you need to seek out some more variety and sit on more bikes. It doesn't really sound like you've got a good feel for what will be right for you yet.

All these WSD bikes are different. They all have a relatively shorter top tube, but they treat the fork, head tube, and rear triangle differently. They will all feel different.