We're planning to do a 7.2.4 speaker system in our family room and the Sierra 2ex's are one of our leading candidates for the base layer of speakers. However, there are three questions that I have that I hope can be answered:

1. We'll likely be using a Denon X6800H AVR to drive these. From what I can interpret of the specifications this should be fine but I'd like to confirm that. We haven't purchased the AVR yet so we could change course there if necessary.

2. Since Ascend doesn't seem any timbre matched in-ceiling speakers, is there a recommendation that would blend well with the Sierra 2ex's? Given the layout of the room, on-wall height channels aren't practical but in-ceiling's would work nicely.

3. Assuming all the other questions have good answers, should we set things up so the middle of he tweeter is at ear height? And, if so, what is the measurement from the bottom of the speaker to that point?

Thanks!