Well, here's what I would do:
Sell your current speakers, or move them to another room and,
1 - Buy K-Horns for the front L & R (where you show corner shelves now)
2 - Buy a Belle for center channel (screen would have to mount high enough to clear the Belle, but with 14' ceiling, you should have enough)
3 - Build custom cabinets using Heresy components to mount high on the back angled walls (or side walls and/or back walls) like the KPT-250 from the Cinema line for surround. http://www.klipsch.com/product/product.aspx?cid=506
This would be a KILLER system for both theater, but 2 channel (with center) listening. If the bass is not enough with the K's, you could add a sub later.