I am loooking for rear inwalls purely for aesthetic reason and WAF. In the front since the TV is mounted on the wall, mounting the speakers on the wall around it is not a big issue aesthetically which is why I got the Energy Take 5's as they are small.
My room is 19x15. Distance between seating and front speakers is about 14 feet. Distance between seating and rear speakers is about 5 to 6 feet.
I have read that speakers have to be voice matched etc. and am just not sure whether speakers from different brands will perform. In future I may replace the front speakers but obviously hoping the rear inwalls to be permanent. Your advise on this is greatly appreciated.