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
Timrhu,
Could you possibly have tried an "X" Dac? The V-Dac is just a small nondecript box that retaile for $299 US and as far as I know it does not have an upgraded power supply. That being said I have read that the V-DAC does make use of some design features that the discontinued X-DAC v8(I think) used.
The MF VDAC goes for 299. why not save up and spent a few extra and buy a used MF A324 DAC. It sounds much better than the VDAC and is only 100 to 150 more on the used market.
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.