I have heard the Centrance Dacmini, EE Minimax Plus, W4S 2, Dacmagic and I own the Rega DAC. I have heard all in the same system and several in mine. The Centrance is among my favorites along with the Rega, but for bass, this is how I rank them:
1) W4S II has deep bass that really extends more than the other units and retains detail and realism.
2) Rega DAC has a bit less bass, but generally in the same ballpark as the W4S.
3) Dacmagic has very good bass, a bit less detail and snap, but really about as deep as the others. On my friends Vandy 5a's we were very impressed!
4) EE Minimax Plus has less bass, but still plenty for most users. The EE strength is in the HF range for me.
5) Centrance sounds quite lean and is a midrange unit, or rather, it's focus is on midrange, but it's still quite nice overall.
A lot depends on the room and other gear of course, far beyond the DAC's involvement.
Cheers,
Rob