I used to be a MP3 nut and downloaded till the cows came home. It sounded great on my Altec Lansing speakers. One day I bought a good reciever and B&W speakers. I piped the same music throught that reciever. I just realized then how crap MP3s actually do actually sound. Many years later with newer higher end recievers and a slew of different revealing speakers, I went back to actually buying all the CDs I enjoyed. I use mp3 today as a means to sample music and the ones that I enjoy I head on down to the local Music store and purchase it. Time can't be better spent sitting on my comfy chair and listening to clear, clean recordings of my favorite music on a decent reciever and revealing speakers. Over the years I have Axioms, Monitor Audio, Paradigm, B&W to thank for that.

ps:I didnt know there was computer experts using MAC products.