Subs or Turntable?

I would start from scratch. Get a 300B amp and some nice speakers, the Devore Baby's or the ProAc monsters, the small efficient ones. Upgrade your DAC get one with volume control. Don'e look for a PA system that supposedly will fill your room, find a position 6 or so feet from speakers and relax. 

Try one SVS-5000 first.

It's free to try from SVS.

I think you will be smacked.

I know I was.

@sounds_real_audio 

Honestly I feel like I'm not that far off. EL34 based PSET class A integrated amp. 87db slim towers. I sit maybe 7-8ft away. I can't remember the exact measurement but it's not that far off. I basically fail to see how this level of effort and expense is going to improve anything vs just providing a different presentation. Especially when it is philosophically very close to what I'm already running. 

@fj40jason 

I did have a lower end SVS several years ago paired with some JBL 590s. That system was a blast to rock out to, but I ultimately moved in another direction. 

I only have two issues with the SVS 5000. First is that I would need speaker level inputs. My amp does not have any additional outputs and getting a different amp just to fit in a sub doesn't really make financial sense at this point. Secondly I have never heard a system that really impressed me that was running SVS subs. When I've been really impressed with a system that has subs, it's almost always REL or JL Audio subs. 

Oh ok. It's a fabulous sub. Ranked 10/10 on AVS, but I'm confused, why are you asking about subs if you can't support the connection(s)