I can't compare it to the Oppo, but I can compare it to the Centrance HiFi M8, which is a very clear and musical DAP Amp. The Centrance costs about double the Oppo and, I'm guessing, must be at least as good if not a fair bit better. Using the HP-P1 with the HP-V1 (and I really recommend this pairing if you go down the Fostex route) gives a very smooth (but not laid back) sound with beautiful weighty bass and sweet treble - sorry but I'm not a hifi journalist. The HP-P1 on its own lacks a bit of power compared to the Centrance but, if your phones aren't too hard to drive, it does the job and is very musical. You can pick up the P1 and the V1 pretty cheaply 2nd hand and even find good priced new ones on eBay. However, if you're looking for something smaller and portable then the P1 / V1 combo is a bit on the bulky side....