Which component to upgrade to improve bass control?


Adding Symposium shelves and rollerblocks to my monitor (Silverline SR17.5) equipped system definitely helped but bass is still not nearly as controlled as I'd like.

Until we move into a different house where I can have a dedicated room for audio, I cannot use subs or add panels, traps, etc. to the room.  

So, I'm left with the possibility of upgrading a component but I have no idea whether my integrated (Wells Majestic), transport (Sim Moon 260) or DAC (Aqua La Voce S2) might be the best candidate for upgrading.

DAC UPGRADE ?
Are R2R ladder DACs simply weak in this area?  Searching the threads, I found a reference to DAC power supplies having a strong influence re: bass control but I lack the technical expertise to utilize this fact. Please keep in mind that I do not enjoy DACs that prioritize resolution above all.  

TRANSPORT UPGRADE ?
Would replacing the Moon transport with say, the new Pro-ject CD Box RS2 T be a better choice? 

INTEGRATED UIPGRADE ?
Would an amp with more grunt be the best choice?

I can only upgrade one of these at this point.
Budget:
Integrated: 5K
Transport: 3.5K
DAC: 5K
stuartk
Less resistance means greater damping factor (control).
Damping factor has very little to do with damping of the membrane (in spite of the name).
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Well, we must all bow to practicality.

Given the fires in CA, the idea of moving back east is very appealing.

We lived in Maine for 9 years and loved it. 

We started looking at real estate listings and talked about having a house built back there but at a certain point were compelled to face the truth  that we've reached a point where age-related considerations render such a move impractical-- perhaps even foolhardy. If one of us were to become seriosuly ill, living on the opposite coast from all family members would not be an asset.  
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