Advice and opinons on this setup (New to the world of custom setups)

[HT X]

Hi Everyone,

First off great site. Been hovering around for about 2 weeks and learned a lot about the general set up of custom setups. Also got to see some awesome Home Theater setups. Well I'll cut right through the chase and basically say I want to upgrade from my sc-ht900 HTB to a more powerful and future proofing set-up. It never really gave me any problems nor sounded bad but after 4 years of having it (bought it the same time I bought my HD TV) I think it's time for an upgrade.

Basically this is the setup I have been compiling.

Fronts: Polk Monitor 70
Center: Polk CS2 Center
Surrounds: Klipsch S3 Bipole Surrounds or Polk Monitor 40
Rears: Polk Monitor 30 or Polk Monitor 40
Sub: Polk Audio PSW505B 12" sub (was looking at svs nc12 but couldn't justify the price for the size of my living room)
A/V receiver: onkyo tx-sr805
Extra: Buttkicker LFE (just bought a bka kit but may return it and go with the LFE)

This would be for a 7.1 surround setup but not sure if it's best to go with a 5.1 since I have no clearance in the back of me to give the 8 feet required for rears. Was also throwing around the idea of having the surrounds and rears mounted on the ceiling and aimed down but that still doesn't solve the clearance issues with the back wall and couch.

Also my Living Room is 13' wide and 16' long. Also my couch is catacomb in the courner of the room and on the oppisite corner is the tv catacomb.

Just throwing this out there to the a/v professionals here. All and any help is well thanked in advance.

Mike