Hi there, I have a Cowon D2 (listening to flac) with a Klipsch X10 at this moment. I have decided to spend USD$350-$400 for upgrading and I have some ideas and see if you guys can give me some advice. I seldom listen to ROCK, METAL and CLASSICAL in my D2 and I am seeking for an overall upgrade in my portable music system =] 1. Buying a SE535LTD or a W4R 2. Getting an AMP (PICO!!) 3. A new player thanks in advance dudes!