The BASS. library now supports a DSD plugin which i have added to musicbee.
The DSD rate is displayed in the Now Playing panel. As far as tags go, MB reads ID3v2 tags (i especially would like some feedback this is OK), but for now doesnt support writing tags.
I have tested this on some freely downloadable DSD files bit I would appreciate any confirmation its working OK so i can report back to the bass developer
http://musicbee.niblseed.com/V2_5/MusicBee_Exe_Patched.zipunzip and replace the existing files where MB is installed