At 10ft from the TV, can we assume that you're putting everything on the long wall (24ft wall)?  From a theater standpoint, it would be better to change the arrangement so that it's on the short wall.  If you can, the 5T/5C option is a great one.

If not, 5T's would still work well for 10 ft away, though you could get away with 4T's at that distance and not be hurt by it.  Most would agree that the 5T is a considerable step up in speaker, so if you can afford it, I'd definitely do that, personally.

Keep in mind: 30 day in-home trial is at your disposal, meaning you can choose what you think is best and then send it back if you change your mind.  Also, the year trade-up policy ensures a good deal when you inevitably need to upgrade. 

Good luck!