Here's my mini-review of the Super Pro DAC on a full audio set-up:
Source/Transport - Harman Kardon HD970 (AD1955, OP275, OPA2134)
Yamaha CDX-596 (AD1854, NE5532)
Preamp - Pioneer C-21
Poweramp - Virute Audio One
Speaker - Celestion 3000 (with ribbon driver and 8" woofer crossed at 800hz)
Subwoofer - M&K V-90 (12-inch)
Speaker wires, IC - DIYed Belden wires/cables
Compared to the Yamaha CDX-596 internal DAC, the Super ro wins hands down.
Compared to the Harman Kardon HD970 internal DAC, though they sound somewhat different, I can't decide which one is better. I guess it's a tie.
Conclusion: At Php 5.5K the Super Pro DAC is a steal!
(As a side note, I guess I'll bring the Yamaha CDP to a techie to upgrade the opamps to something better)