I own a V-dac and CD73 and the V-dac doesnt get anywhere near the same league as the CD73. The CD73 gives a slightly more macro view of elements within the soundstage following the musical flow well compaired to my Violectric V800 DAC. The V-dac dissapoints me with its roll off in the high frequency extreme and the bass gets totally lost on all but the most basic low notes.
I would maybe take the time to explore the rDAC.... the USB sounds promising in implementation, just because its not been around long enough to stir up opinions it doesnt mean it should be ruled out.
heres a couple of shots of the suggestions layed out anyhow... the guts of the CD73 and V-dac.... so you can admire where the materials money goes.
(I had no idea people had trouble with the CD73 transport. For all my thousands of cd`s its only refused to read 1 to my knowledge and has been transported all over the uk and sometimes stored for long periods. yet ive never sufferd the slightest glitch. maybe im just lucky?)
Arcam CD73

Music Fidelity V-dac

note. ive replaced the RCA connectors with a direct wire approach using DNM solid core and bullet plugs. also tried a host of power supplies and improvements can be made but the analogue output stage is the limiting factor on the V-dac it seems.
Edited by BBHT - 12/15/10 at 10:48pm