I have my rear speakers at 2.5' behind the listening position and sounds okay in my system. Properly set distances and trim levels in the receiver are key for placing speaker in that short of a distance. Ultimately it will be up to you if you like them that close. If you plan on using automatic speaker setup or room correction, such as Audyssey, I've found that the software tends not to like the rear speakers that close to the setup mic. I suggest either doing 1) manual distance and level calibration or 2) skipping the measurements that are made behind the listening position with the automatic setup.