If you want to integrate the receiver in the best possible way, make sure you choose a receiver with a well documented ip/rs232-protocol.
http://www.awe-europe.com/ir_232.html can be of help.
After this i would recommend using www to find some thrusted reviews.
In the end review them yourself by listening, ask your dealer to set some up.
Tip: the marantz line-up from 2013 gets great reviews, the control protocol is well documented (almost the same as the denon-protocol) and the can be bought with great discount atm.