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
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Pulling your speakers out from the back wall generally helps avoid a bass bump. I would think 3 feet would be ok, but could it be that your listening chair is located in a bass node? That happens a lot when folks place their chair up against a wall (or very near one). Frankly I think, as you already suspect, that you're looking for love in the wrong places. :-)
@tomic601:

Thanks for your generous offer. Unfortunately, there's not a practical option for relocating amp at present.  

@tvad:

Yes-- I found ads for both the Pass and the Coda for sale, used. As it happens, Coda is  located an hour's drive from me, in Sacramento. 

@newbee:

Listening chair is positioned 4 feet from back wall, which is actually a half-height wall, separating living room from dining room. 
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