To throw some caution into the wind, I heard the Mani very briefly with my DL-103 (MC) and felt it had good noise floor but did not do my cartridge any favors; seemed harsh. Results were much better with my Shure m91ED and sx-1280 (IMO better than the built in phono) but still felt it might have been lacking something I couldn't quite put my finger on, maybe lacking in fine detail?
I ended up going with a Phonomena II for the DL-103 which offers greater flexibility in loading and gain settings which I am pretty happy with so far; of course it is more expensive.