Hi
There are several manufactures that have complete in wall systems.
About 70% of the systems I install are in walls.
It is very important when choosing an in wall system that you take
room dimensions, room acoustical properties,and listening habits, example
(50% movies 50% HT or ?) into consideration. If your room is large and you
are building a system geared toward Home Theater and you want allot of impact and dynamic capability then this is what you need to look at
http://www.klipsch.com/product/search.aspx?searchby=type
If you are building a system for a mix of HT and Music then this is what you should be looking at Please note the in wall center
http://www.mordaunt-short.co.uk/avant-architect/specs.html
I often use a conventional center speaker with an in wall system
the center is installed above, below or in an entertainment center
Hope this helps