The diymod and compact flash mod are what I'd recommend doing. I currently own the 5.5 diymod (with Pico), the X Walkman and the Amp3 Pro 2. To my ears, my diymod bests both of those setups. I could discern more details and more clearly defined vocals. It's forward sounding but at the same time, has a tinge of warmth thrown in for good measure. This combination is a delight.