Being "sent to the basement" isn't all bad, but to set up a proper room you have some work to do, IMO. I had a system in my basement but it wasn't set up right and equipment was in need of repair. I started over, so here are my experiences.
I would not share systems. It is easier to optimize both systems that way. On a side note, I blew up a nice 50W class A amp once because I left the speakers on down stairs and tried to drive 4 at once. First and only time I had smoke in all my years of audio experience.
I would put up a wall on the dotted line,carpet the floor, install wall over the concrete, install a ceiling. This can be drywall. Some install acoustic insulation in the wall and ceiling. Drywall does not completely stop sound waves by the way. I think the 29 ft depth is OK assuming your speakers will play loud enough.
Placement of speakers can be done using the Vandersteen method. It is on their website. Otherwise, place them about as far apart as you are sitting back in the room. You might have to toe them in. Those look like pretty nice speakers and not too bad to place.
I would call GIK acoustics for room treatment. If you clap your hands now it would ring quite well I'm sure. I worked with a recording engineer named Mike and he was super helpful. This will probably be about $2K but well worth it.
As far as equipment goes you have a good amp. You could set up the following: streamer to dac to amp. A preamp is not needed unless you want to play CD, tuner or phono. I use volume in my streamer app. Some DAC also have volume but I prefer to leave them turned all the way up and use the streamer app. I think the Parasound is a Class D amp but not sure. If so, you could try a Class AB amp. You do need good power to properly drive those speakers.
Equipment choices: A Bluesound Node 2i is a good streamer. $550. If you want more expensive make sure it has a good app that works with your streaming service which is 20 a month. The DAC is "OK" in the Bluesound so I added a DAC. Choices include Topping, Denafrips, Benchmark, Orchid, MHDT, Schiit to name a few. You didn't mention a dollar limit so you can buy integrated amps with streamers and DAC now. I prefer separates.
Subs: Regardless of what your speaker specs say, they will sound better with subs. However, the subs have to be properly integrated with the system. This is why multiple subs are often used. It helps eliminate standing waves. Your room treatments are also helpful in good bass response. I recommend crossing the sub over at 80-100Hz. I would call Audiokinesis. You can get 2 subs for $1600 and 4 for about $3200. It includes an amp. If you like messing around you can buy a DSP and mike and try to get rid of all the acoustic problems but when I got all the treatments and placement of speakers/subs right the benefit from the DSP wasn't worth it IMO.
I would not share systems. It is easier to optimize both systems that way. On a side note, I blew up a nice 50W class A amp once because I left the speakers on down stairs and tried to drive 4 at once. First and only time I had smoke in all my years of audio experience.
I would put up a wall on the dotted line,carpet the floor, install wall over the concrete, install a ceiling. This can be drywall. Some install acoustic insulation in the wall and ceiling. Drywall does not completely stop sound waves by the way. I think the 29 ft depth is OK assuming your speakers will play loud enough.
Placement of speakers can be done using the Vandersteen method. It is on their website. Otherwise, place them about as far apart as you are sitting back in the room. You might have to toe them in. Those look like pretty nice speakers and not too bad to place.
I would call GIK acoustics for room treatment. If you clap your hands now it would ring quite well I'm sure. I worked with a recording engineer named Mike and he was super helpful. This will probably be about $2K but well worth it.
As far as equipment goes you have a good amp. You could set up the following: streamer to dac to amp. A preamp is not needed unless you want to play CD, tuner or phono. I use volume in my streamer app. Some DAC also have volume but I prefer to leave them turned all the way up and use the streamer app. I think the Parasound is a Class D amp but not sure. If so, you could try a Class AB amp. You do need good power to properly drive those speakers.
Equipment choices: A Bluesound Node 2i is a good streamer. $550. If you want more expensive make sure it has a good app that works with your streaming service which is 20 a month. The DAC is "OK" in the Bluesound so I added a DAC. Choices include Topping, Denafrips, Benchmark, Orchid, MHDT, Schiit to name a few. You didn't mention a dollar limit so you can buy integrated amps with streamers and DAC now. I prefer separates.
Subs: Regardless of what your speaker specs say, they will sound better with subs. However, the subs have to be properly integrated with the system. This is why multiple subs are often used. It helps eliminate standing waves. Your room treatments are also helpful in good bass response. I recommend crossing the sub over at 80-100Hz. I would call Audiokinesis. You can get 2 subs for $1600 and 4 for about $3200. It includes an amp. If you like messing around you can buy a DSP and mike and try to get rid of all the acoustic problems but when I got all the treatments and placement of speakers/subs right the benefit from the DSP wasn't worth it IMO.