Tough choice you have there. They all look pretty good. Did you notice that the Trek has 650c wheels? All the rest seem to have 700c. Not sure how much difference that makes, but I suspect that it will be a lot easier finding replacement tires and tubes in the 700c size.

Don't know your opinion about Bikes Direct. Also don't know your frame size. They have a Kestrel Evoke right now for $1500. That's the full price, no sales tax or delivery ... to your doorstep. A little above your price point, but once you figure in your local sales tax, it might be a wash. The biggest disadvantage is that you can't ride it first, and you have to complete the assembly yourself. Basically all you have to do is attach the handlebar to the stem, the wheels, your own pedals, and adjust to your size...then make sure the brakes and dérailleurs are set correctly. You can run through the Competitive Cyclist fit guide to get dialed in pretty close.

Hyper link to the BD Kestrel Evoke 105

Oh, the Evoke is a carbon bike.

I recently got their Dura-Ace Kestrel. Did the final assembly myself then took it to the shop for them to do all the final adjustments and check everything over. Cost less than a hundred bucks, but I knew the bike was safe to ride. (I should have saved $800 and got the Ultegra version instead.)