Alex what exactly are you after? what about the low end of the TLs do you really not care for? is there not enough of it? is it lacking some characteristic you desire? is it sloppy or loose sounding?
I don't like the TLs LACK of bass, not sloppy or anything. But my concern is that The T mod will not be no much more bass than the straight digimod, and that the W mod will be too much sloppy bass...
To my ears, and I've run ld's and sd's through the w-mod, the warm mod doesn't add more bass. It just smooths things out. Smoother on the top end throughout the mids and lows. Makes (to my ears) a more pleasant playback experience. Sloppiness is not a word I would describe the warm mod. Surprising amount of detail. I would not compare the sonic characteristics with say an mp-2/sbm-1 combo which is very warm (and extremely pleasing to my ears with the right mics) and at times can seem sloppy. I actually think the warm mod is a misnomer as it isn't overly warm. It has it's own distinct coloration, just like any pre.
I'm sure there are a bunch of sources on the archive with both t mod and w mod paired with ADK's. Give them a whirl.
Of course, these are my opinions only. YMMV