Your screen is crooked.
Other than that, with such a nice theater, I would try and save for a sub to match. The sub has the greatest impact (pun intended) in the system. It really adds a lot to both music and movies, especially movies.
At a minimum you should get nothing less than a PB1000.
Klipsch RF-62II, RC-500, RS-400, SVS PC12+,
Def Tech SC8000
Harman Kardon AVR 1600
PS3, Apple TV, Sharp 70" Qattron