short answer: don't waste your money.
long answer: Cambridge DacMagic uses the WM8740 dac chip. while implementation & everything else may be important as well, you can find this dac chip at 1/4 the price in FiiO E7 ($70) vs FiiO E70k ($89) vs E17 ($120) vs iBasso D-Zero ($100). all those are portable dac/amp combos. if implementation is worth $300+ to you... lol. there are also a lot of other high-quality options in the $100-300 price range including the great performance:price $70 HiFimeDIY Sabre USB DAC 2 with an external PSU (ESS Sabre ES9023 dac chip), the popular $100 schitt modi dac (AK4390 dac chip), the $200 audio-gd nfb 12 (w/ ESS sabre's flagship ES9018 dac chip), the $300 M-Stage Dac (PCM1792 dac chip), and the $300 emotiva xda-2 usb dac (AD1955 chip). since everything sounds great now, I would consider these cheaper but high-quality options to see if you can notice a significant sonic improvement before jumping to something that expensive.
edit: ooops... didn't realize this was asked 3 years ago. =S
Edited by money4me247 - 12/24/13 at 8:36am