I think a sedan looks good with a nice stance, everyone has a hatch.
But as mentioned above, if you plan to do a SVT/ST170/RS look-a-like you'll need a hatch. Cause parts like the rear bumper won't fit on the sedan.
But also keep in mind the sedan, hatch and wagon all share the same wheel base and everything except the rear suspension on the wagon is the same from the back seat forward.
The sedan does have the pass through back seat to carry long objects but your limited in height where you have more room in the hatch. But you can close off the trunk on the sedan where the hatch just has a pull cover. With the seats up and the cover one I believe the sedan has more cubic inches of storage. <----not sure on that. The interiors are the same cubic inches regardless of what model you have.
Do one thing every day that scares you. -Eleanor Roosevelt