Musical Fidelity V-DAC vs. Spitfire/Supplier Duo


I'm looking to try and upgrade Redbook listening using my Oppo BDP-83 as a transport. I'm on limited funds and am considering two options as of yet. Musical Fidelity's V-DAC or the Spitfire/Supplier Duo. I've read good reviews of the V-DAC, but I'm hesitant about the "wall wort" power supply. Specs on the Spitfire/Supplier Duo look promising and I like the beefier power supply option, just not sure about quality.
Am I placing too much of an emphasis on the power supply of the V-DAC? Or am I tossing dollars to the wind at this price point to try and improve the Oppo's stereo listening?
Thanks for any input and hopefully, personal experience with either of these DACs.
powerwindow
I think that it is V-DAC that uses a better DAC chip and has lowered jitter figures ... I wouldn't be surprised if it beat the MF A324.
After checking, it was the VDAC v.3 I owned. Of the 6 or 8 dacs I have owned it was my least favorite.
After rechecking, it was the X-DAC v.3.
PLEASE DISREGARD ANY OTHER COMMENTS i MAKE IN THIS THREAD AS I CLEARLY DON'T KNOW WTF I'M TALKING ABOUT.