Need advice on speakers only a few inches thick

I have a plasma display and would like to attached L/C/R speakers to the mount extenders for the left, right, and center speakers. The only problem is that if the speakers are greater than 4 or 5 inches deep, they will protrude in front of the tv's surface. At four or five inches, the speaker grill will be roughly even with the tv's surface, which is my goal. Most speakers out there are too thick for me to use. I've already acquired some Definitive Technology Mythos 2 and 3's for my bedroom, which is set up as described above, but now it's time to do the same in the living room. I'd like to experiment with different speakers in each room and wonder if anyone here has knowledge of similar speakers, not the Definitives, less than a grand a piece that would work for me?