The Focal Be models are magnificent, and if you can afford them, I have zero qualms in recommending them whole-heartedly!
That said, in that sort of price range, there are certainly alternatives worthy of consideration. Off the top of my head, I would also consider Paradigm's Signature Series on-wall or in-wall speakers (which also use Beryllium tweeters, similar to the Focal Be tweeters) and also RBH's Signature Classic Reference and Signature SX Reference.
For me, personally, I just love those Beryllium tweeters. They're my personal favorite for delivering ribbon-tweeter-like resolution, but with even wider and more even dispersion and higher output capabilities.
I haven't tried Focal's in-wall Be speakers in person, my experience with the Focal Be tweeter has come from their Electra Be home speakers and Professional SM11 and Solo6Be/Twin6Be Studio monitors.
I have heard the Paradigm W5 Signature on-wall speakers and the in-wall Signature SIG-LCR 5 speakers though, and they are superb. The output capabilities of the W5 are incredible for a >6" deep on-wall speaker and the in-walls gain even a little bit extra over the on-walls. Give the W5 on-walls some consideration though - you might find on-walls to be an even easier installation. And if the plan is to put the center speaker below the screen anyway (and not behind an acoustically transparent screen), then I would actually favor the W5 C on-wall for the simple reason that it's 5.6" depth will bring the front baffle out infront of the frame of your screen, which will help to reduce any weird diffraction and reflection problems that a flush-mounted in-wall center might have.
Hope that helps!
