I have two pairs of in-wall Polk Audio RC85i for my Surrounds sides and back. They are driven by an Outlaw 7125. They put out a little bit of a hiss if you get too close but, otherwise, I am happy with the arrangement. My main speakers and subwoofer are floor standing - I just couldn't bring myself to mess with the great sound my Polk RTA-12Cs have been giving me for the last 20 years. Like someone else said in this thread already, in-wall is a commitment.

There are also some excellent "on-wall" speakers. I spent some time drooling over some Martin Logan Fresco's before I decided to stick with Polks.

Does anyone use Newform Research Speakers with Outlaw Electronics?

http://www.newformresearch.com/

These, like Outlaw, are not available thru dealers and have to be purchased on-line. Great sound for great prices too.

I did not see your budget, but PSB has custom in-wall and in-cabinet speakers that have won some review awards. Definitely check them out as you audition. I am a PSB owner do recommend adding them to your list.
UMtiger

I will add axiom audio, M&K, and RBH.

You should try to demo Triad in wall monitors.
I have their Silver series a couple of in wall
subs and am very satisfied.

Whoops - Let's try this again.

Tweeterman - I checked out their website and I am intrigued. Great drivers (Vifa / Scanspeak). What are your opinions of them? Build quality etc. Sound preference being subjective of course.