First of all: I wouldn't consider myself as an audiophile due to a lack of inventory, but I can judge good sound. not beats by dre :)
I know it's not the most high-end headphone, but with the DAC and amp that I have, along with playing CD's, on Windows 8 using iTunes, it sounds pretty darn good. But is an amp really needed? If so, what's the best match for the Logitech UE 4000 under $100? I listen to a variety of music from rap, to rock, etc. But anyways, is an amp really helpful with the UE 4000? The one I am currently using is an E-MU 0202 USB 2.0 Dac/amp. It's old, but still works nicely. I think it sounds pretty good when playing in 24 bits at 192Khz (I think that's it). I wish it didn't run off of USB power, but it's still a pretty solid DAC, although I don't have much to compare to. So what are your thoughts?