Ben,
Very nice system for a college student, as I am one myself. I love the epos 15.2 and rega planar 3. As for upgrading the cd playback I would recommend either the Marantz SA8260 or try the Denon 2900, or the cambridge player should be fine. If you want to save some real money try going with the playstation 1 as a cd player, its a real giant killer!