For a 7.2 setup the RTi A1s can at best be surround speakers, listen to some usual suspects with Denon yourself, nothing really can substitute your own judgement when you listen to a combination.
Try the RTi 5/7, KEF Q500, Dali Zensor 5/7, Monitor Audio among others, these are mostly 'safe bets', if not stellar they never really disappoint for the price you pay. Important to listen to them yourself and see which ones you prefer.