Freeflap, PLEASE move those speakers out from the wall! You have MAGNIFICENT speakers, give 'em a chance! It makes a WORLD of difference in the sound quality. I sincerely doubt that your center channel is designed to mount directly against a wall. As I am finishing re-working my home theater (and patiently awaiting my A7-900) I have been playing around w/ speaker placement as well as beginning the acoustic treatments.
When we place speakers up against a wall, we are significantly altering the frequency response and clarity. Instead of the speaker radiating into a 'full-space', you are now only using a 'half-space' which is important for the lower frequencies. Unfortunately, your crossovers were not designed to do that.
I bought a pair of the eD 6T6 Towers for listening in another room. They certainly are not high-end speakers by any stretch, but as they break in, the sound is improving. Initially I had them placed about 8" from the back wall (room logistics and appearance issues for the wife) and they sounded quite muddy. By moving them about 20" out from the wall, it made a tremendous difference.
Same issue applies w/ side walls. That is why I dislike the narrow theaters that many setup. You need a LOT of sound absorption to deal with that (and is why I set up my theater wider rather than deeper...although I only wanted one 'fixed' set of seats).
Moving the LCR speakers off the front wall and getting some absorption material behind them will make a big difference...give it a try!
Sorry for the long OT digression, but I thought that it might prove useful to some who are viewing this thread.