Buying my first road bike.. oh please help

And I'd like some help please!

Ideally, my budget is around $800. This will be primarily for fitness, but I'll probably do some centuries and possibly a duathlon.

Here is what I'm looking at :
Fuji Finest 2.0
Giant Avail 3
Giant Defy 3
Trek 1.2
Specialized Allez

Any opinions? Or other suggestions? I could go a little higher on the price. Does anyone have any experience with these bikes? Would they work well for what I want.

Off the topic, but I'm totally digging this site. I'll be around often. :D

Have a really good bike guy or gal fit you before you purchase any bike. I have the Fuji Newest 3.0. It is a fine bike for someone just not me. I bought it at a store (which will remain unnamed unless asked :rolleyes:) and the guy might as well have been fitting me with his eyes closed. The Fuji is my first road bike, so I have lived and learned, the hard way. Enjoy the hunt (it is fun!).