A few suggestions.
A: You need an equipment rack, setting the receiver on the carpet isn't a very good idea for the sake of the receiver and a potential fire hazard. Just get a cheap Wal-Mart stand to start with, they have nice looking A/V stands for right around $100 at Wally World.
B: The center is to far below the tv, or rather the tv is to high. I could see you having neck problems from looking up to watch tv.
C: Last suggestion, it looks like the fronts aren't toed in. Toeing them in will improve your imaging in most cases.
I didn't see a sub or surrounds, so some other upgrades maybe?