Have two Fusion-8s, next step?
I am looking for some wisdom on where to go next. I have two Fusion 8's powered off a Denon 1712 for my L/R. I also have a PowerSoundAudio XV15 sub. I should have built that, but hadn't discovered DIY at that time. I am wondering where I should go next. My living room is roughly 12x22x9, so 2400 cuft, but it has a hallway that opens to the rest of the house.
(I have an Emotiva 2ch amp, but I don't think I'll need that given the sensitivity of these speakers plus the lack of pre-outs on the Denon.)
I think the clearest option is to purchase 3 more Fusion 8's for Center and back speakers, but thought I would ask what people would do in my position. I'd like to build some version of the MartyCube, but have two reservations: One, I have no idea how it would integrate with my PSA sub (which I think is roughly equal to the mini-marty?) and two, I currently rent where I live so relocation of speakers unfortunately has to be somewhat considered.
My main questions:
1 - Volts or Fusion 8s for rears?
2 - Should I go Fusion 12s for fronts and use existing 8s for rears? Would the main reason for doing this be loudness/sensitivity as opposed to "better sound"? (Or am I just trying to spend more money?)
3 - Should I look into using REW?
When I watch movies, I'll have the Denon at around -7dB, which seems to be a little bit louder than I usually see. I'm not sure if that's because I haven't lost my hearing yet or if I've screwed something up in my setup.
Any and all thoughts are appreciated. I've never really posted, but I've gleaned so much information from this forum I can't say thanks enough!