Does an upgrade make sense?

Thanks all. Good ideas to chew on. The speakers are actually out further from the wall than in the pics.  About 30 inches from the rear of the cabinet to the wall. The room is a huge finished basement, roughly 36’ square. So there really is no short wall available. My lil oration is I can’t move my chair back any further so the speakers can’t come out any further.  But I’ll think about a total redo of the room. 

Subs are a good suggestion too. I’ve had a single sub in the past when using an AVR as a preamp. I don’t feel a lack of bass but I understand what they can do to free up my speakers.  But I don’t like crossovers either. 

in terms of streamer and DAC, if I were to go separated, DAC first?
 

LOL all good advice and pulling me in so many directions. I’m thinking I’d update speakers before bringing in subs. Have thought of the Rubicons—I got the Mentors because I couldn’t afford the Epicons at the time. I also see that my DAC is long in the tooth. I’ve done a lot around vibration control and have upgraded power cables. Bottom line— I’m thinking DAC or speakers. More bang for the buck with a new DAC I think. I’d want balanced outputs. What do you recommend $3000 or so, used is fine.

Lol. For critical listening I have thrown blankets over the tv. Very slight difference but it makes me feel like I’m doing something. 

Thanks all. First thing I’m going to do is look into a Puritan 156. And tweaking my room set up. I have a solid, dead center image and excellent side to side sound staging as is — can I get more depth? I need to hear my system without the tv and components between the speakers. Lots of work lies ahead. Thanks again for all the advice. 

I have 4 inch maple plinths under the monoblocks and preamp. These are in a salamander cabinet and have rubber feet (when they were in the carpet I used spikes). I use IsoAcoustic pucks under the Cambridge 851N. Under the speakers I use IsoAcoustic GAIA iii (these were a big improvement over the carpet spikes they replaced. I’ve wandered all over the place with cables—Acoustic Zen, Nordost, Kimber Select and now Morrow level 4 and 5.  I use Morrow power cables on the streamer and preamp but just the stock cords on the monoblocks — I’ve experimented with Nordost Vishnus and Acoustic Zen (Krakatoa I believe) and never heard much differences. I’m a cable believer. The Morrows work very well at a much lower price point and I like them because they are so flexible. My SP5 Biwire speaker cables made a big difference.  But as far as the monoblocks go,  nothing I’ve tried has improved their killer sound. 

I just switched to wired streaming.  The WiFi worked well with only an occasional drip out, but was surprised to find that hard wire connections made an improvement in sound quality.   I’m looking for a better Ethernet cable.