After months of pondering, I've still not arrived at a decision as to how to best spend a (very) limited budget. I've got an ageing Denon DM31, a pair of Grado SR60s, a Philips laptop and, as from yesterday evening, Spotify premium. Whilst I do enjoy playing cds, I've got to be honest, most of my listening is via Spotify simply due to the convenience. At the moment I use a pair of Sennheiser PX100s plugged straight into the laptop's headphone socket. Having just signed up to Spotify premium, I've decided that I really do need to improve things re sound quality. So, my question (clue in the title): What's the best way to spend £100 or less to improve sound quality. Obviously I'm looking to utilise the Grados. Is an offboard DAC the way to go? As mentioned in another post, does anyone know anything about the Headphonia USB/DAC/stick? Looks like a cost effective approach, but I think it's a relatively new product and I can't find any reviews. I keep going back to consider the Beresford TC7520, a little over budget, but if this is by far the best option...