Question Recommendations for AV Receiver and speaker placement ?

[Lucrin]

So I have been planning on installing a surround sound system for my family/movie room. Finally there were some pretty great deals on speakers for Black Friday so I bought the following 5.1.4 speaker setup:

All Klipsch models:
R-820F x2 for front left/right channels
RP-400C center channel
R-51M surround speakers
R-41SA x2 for 4 height channels
R-120SW sub

I am looking for recommendations for a good receiver to pair with these speakers. From my research so far my front runners are the Denon AVR-X3700H or AVR-X4700H. Anyone have any other recommendations or a reason I should prefer one of the two I listed?

Additionally as far as speaker placement I am going to put two of the R-41SA speakers on top of the left and right tower speakers, but for the other two should I place them on the floor behind my couch, or would it be better to wall mount them near the ceiling pointing down behind the couch?

 

[Lucrin]

Alright well unfortunately I haven't gotten a response to the above but hoping I will to this. I think I am settled on getting the Denon AVR-X3700H . So for the Atmos height channels I am thinking I am going to mount the 4 R-41SA speakers on the ceiling. I know this is none standard and having in ceiling speakers would be ideal, but 1. I can't do in ceiling because of restrictions in my room, and 2. because of the deal I got on the R-41SAs doing in ceiling speakers would cost 4x as much. If I were to ceiling mount the R-41SAs, should I stick with the official Dolby layout shown below? Or, should I move the front Atmos speakers to be right above the TV as I have seen some people do in this sort of hybrid setup?