Cleveland, I think from the first post you're looking for a frameset? If so I've spent a lot of time looking at the same thing. I've looked at the pricey ones like the Roubaix SL4 along with the Domane, etc.

For under $2k take a look at the Franco Kannan, and I also saw a Fuji that looked decent, all in carbon fiber, medium relaxed geometry and tall head tubes.

I can tell you that the biggest difference between my current frame and the geometries of 5 other possibilities the greatest single difference in all of them was the head tube length and about half a centimeter (if that) in chain stay length and a couple of millimeters in stack. my current bike is way too aggressive for the style of riding I currently do which is why I started to look at the "endurance" categories (and I looked a lot).

In the end with so few differences I'm opting for a new carbon fiber frame that is not considered to be an endurance but does have a nice long head tube (140mm with a 53.4 top tube), good stack, etc.

I guess my point is you may want to expand your search to some nice frame sets that may still be considered "racers" but are also built for stability and comfort. It just may give you more options in your price range vs. a select few.

FWIW I'm a 43 year old recreational cyclist. I don't race but like a cool bike that I can ride at least a few centuries on while feeling good. I ride about 150 miles per week in the spring/summer/fall. I'm not particularly flexible (but working at it).
good luck