I'll go ahead with some of the usual questions that people here will ask:
1) What are your sound isolation goals? Do you want as little sound to escape the room as possible or is it more about the in-room performance?
If you'll be watching when others are sleeping it's wise to look into sound isolation methods - this also works to keep sounds out of the room allowing you to hear the softest part of soundtracks without the volume being up so high that the loud sounds blow your ears out. However, these methods can become quite expensive - doubling your drywall, adding clips and channel, Green Glue, etc. For a primer check out https://www.soundproofingcompany.com/
2) Is the 6'5" ceiling height just under the HVAC? What is the height in the rest of the room?
The HVAC can be integrated into a soffit depending on what the rest of the room is like.
3) A good bit of money can be saved on your receiver by going to Accessories For Less - they have remanufactured items from Denon - and are an authorized dealer.
4) If you are a bit handy (don't have to be anywhere near an expert) then the best bang for your buck is very likely to be DIY Sound Group. You order the speakers and a pre-cut flat pack and put them together yourself. 3 HTM-12's and 7-8 Volt 6's can be had for $1500 or less - and these will sound MUCH better than any Klipsch you'll get from Best Buy. They are also able to be driven to extreme volume by even lightly powered receivers - the Denons you mentioned will easily blow you out of the room attached to these speakers, with very high sound quality.
If you're $1500 in on all your speakers, $1000 at accessories for less on the Denon - that leaves $3000-5000 for subwoofers (again I'd go DIY), a screen, wiring, etc. With those speakers and receiver along with a pair of DIY subwoofers, I guarantee your audio chain would blow anything Best Buy would sell you away.
https://www.accessories4less.com/make-a-store/category/avreceiver/home-audio/receivers-amps/home-theater-receivers/1.html?r=5482f6d5&brand_f[]=DENON
https://www.diysoundgroup.com/home-theater-speaker-kits/home-theater-series/home-theater-monitors.html
1) What are your sound isolation goals? Do you want as little sound to escape the room as possible or is it more about the in-room performance?
If you'll be watching when others are sleeping it's wise to look into sound isolation methods - this also works to keep sounds out of the room allowing you to hear the softest part of soundtracks without the volume being up so high that the loud sounds blow your ears out. However, these methods can become quite expensive - doubling your drywall, adding clips and channel, Green Glue, etc. For a primer check out https://www.soundproofingcompany.com/
2) Is the 6'5" ceiling height just under the HVAC? What is the height in the rest of the room?
The HVAC can be integrated into a soffit depending on what the rest of the room is like.
3) A good bit of money can be saved on your receiver by going to Accessories For Less - they have remanufactured items from Denon - and are an authorized dealer.
4) If you are a bit handy (don't have to be anywhere near an expert) then the best bang for your buck is very likely to be DIY Sound Group. You order the speakers and a pre-cut flat pack and put them together yourself. 3 HTM-12's and 7-8 Volt 6's can be had for $1500 or less - and these will sound MUCH better than any Klipsch you'll get from Best Buy. They are also able to be driven to extreme volume by even lightly powered receivers - the Denons you mentioned will easily blow you out of the room attached to these speakers, with very high sound quality.
If you're $1500 in on all your speakers, $1000 at accessories for less on the Denon - that leaves $3000-5000 for subwoofers (again I'd go DIY), a screen, wiring, etc. With those speakers and receiver along with a pair of DIY subwoofers, I guarantee your audio chain would blow anything Best Buy would sell you away.
https://www.accessories4less.com/make-a-store/category/avreceiver/home-audio/receivers-amps/home-theater-receivers/1.html?r=5482f6d5&brand_f[]=DENON
https://www.diysoundgroup.com/home-theater-speaker-kits/home-theater-series/home-theater-monitors.html