Im getting a Coupe, personally i think they look better, its subjective though, wait until the coupes show up at dealers then go check them both out for yourself, drive them both, then make your decision based on what YOU like.
As far as money goes, i say you wait another month or two, once the hype goes down, you will be able to talk them down on the price.
I think its stupid to pay almost 21000 for a civic with nav. i wont pay over 19,500 for one, and will try to talk them down to lower than that.
So for a regular EX, auto, coupe, i would say try to get them to go down to 18,000, or 18,500 before TT&L.
sedan because it just nice to be able to put something in back seat without having to put everything down adjust the seat and do this and that, or walking all the way around the car. 4 doors is just more convient IMO. Personally I have 2 doors, but GSR's are hard to find in 4 doors, but my fiance is getting 4 doors if we can find the right one.