W20SE is the way to go if you can afford it. You can always upgrade the DAC (or not). The W20SE improved upon W20 in terms of treble without any sibilant effects, which was the case with W20.
The SE is also more analog-like overall, with greater dimensionality and space between instruments. Instrumental images are more solid, tangible, and three-dimensional, with a greater impression of body.
W20SE will excel further with a good USB or AES cable and equally good BNC clock cable.
Hope you enjoy the audition and company of @ghdprentice.