Charile,
This weekend I listened to the Weiss DAC 202 and the Berkeley Alpha DAC, although not with Maggies. Each sounded excellent and, IMO, best when connected directly to the amp, rather than through either a SS or tube preamp. This was especially so with High Rez music, but with CDs as well. I will demo each at home when my Maggies arrive (hopefully) in July. The tube preamps seemed to my ears to muffle the sound. I preferred the definition from the DACs to the amps without any preamp.
Regards, Steve