I have only had a mac for under a year. I will admit that I really don't know much about them and am finding out what wonderful things that they can do. I have built my own Windows PCs for many years and seen them evolve with what features they offer. In January I bought myself an iMac and am left wondering about sound and what to expect. The unit does have speakers off the back and they sound rather lousy. Hooking in a set of headphones is also a pain as all the connectors are at the back where I can't see them. I was thinking of hooking up something better to the unit but have not figured out what yet. I was wondering if it's common to buy an external USB DAC/Amp to plug into an iMac and just ignore what is built in?