Finally going to step up to Atmos. I have the Denon X3400H so it's only 2 front Atmos capable. Have had this receiver for years but just haven't done Atmos. I took a half ass attempt at it years ago but it sounded terrible because I half assed it. \nAny way I didn't want to go expensive for these Atmos speakers so I ordered the Polk XT90's. Any thoughts on these? They were on sale for 149.99 bucks. \nAtmos fronts should be high up on the wall, actually right where the wall and ceiling meet? They should be the same exactly width of the main speakers? Is this correct or not? Any other advice? Tips?