I've been planning on getting new PC speakers for a while now, but it's only just dawned on me that I use my headphones far more often than my speakers. This is mostly due to a lot of background noise (thanks London...) and not wanting to piss off my housemates. So I've decided to take the money I was going to spend on speakers and instead buy a reasonably good headphones and a amp/DAC. While my motherboard has relatively high quality audio out, the headphone jack suffers from far too much interference from the NIC and DVI outputs. Am I right in assuming that using the optical out instead will completely negate that problem? At the moment I'm considering the iBasso D10 Cobra paired with Sennheiser HD600. Total comes to around £400 (I wanted to spend under £500). Are these two products well matched in terms of quality and range? Is there anything better for the money or should I be spending a little bit more for better matched products? Thanks!