I'm finally looking for a new player after 2-3 years and I need something small with gapless playback 8 gigs of space and enough power to drive etymontic er4s's comfortably. only one I've found so far is the trekstor vibe does it have as much power as my cowon u3 because I feel they have...

I've just picked up a pair of AKG-k501's and upgraded my soundcard in my system to a TerraTec DMX 6 fire pro. Would this plus a cmoy be enough to drive the 501's ok or is there an amp (not a kit please!) for under $120 that would drive these headphones better ?