About to install a 7.2.4 layout. I got a pair of 90-RTs and a pair of 70-RTs for a great deal, so that is what I'm using for the ATMOS speakers. My question is, which should I put in front and which in rear? My first thought was to put the 90s in front, but, then, I thought maybe rear would need more bass support. The rest of the system consists of RTi-a7s and CSi-A6 up front, RTi-A3s for surround and RCi55s for back and two PSW 505s. Marantz AV7702 MKII and Rotel RMB-1075 and RMB-1066.