I've started test riding! I actually have a spreadsheet I'd be happy to share if anyone is interested, although I will say my 'impressions' on each bike are mostly just based on gut feelings

A lot of bikes I've just test ridden around the parking lot and have been able to tell they are not for me. I've got a couple in mind I may take on longer test rides (Bianchi Impulso and Trek Emonda), but I still want to track down and test ride the Specialized Amira, Cannondale SuperSix Evo, and CAAD10 before I start narrowing down the list.

It turns out it is challenging to find bikes in my size but not impossible. The Cannondale ones are the only ones I'm having real trouble with, but I think if I venture down to the high-end shops in DC I'll have some luck there.