Basically, I see the world of media purchases in two categories: Buy and Rent. "Buy" means it's mine, I can do ANYTHING I want with it, there are NO restrictions beyond what the law says. "Rent" is everything else... stuff that expires, stuff that could potentially stop working for some reason other than I lost the item or damaged it. iTunes songs fall into the "Rent" category... sure, you own them, but technology is in place that could hobble you at some point.
Unless you are an audiophile, the difference between your music purchase and mine is simply a matter of semantics. You go to a store and buy a cd. You bring it home and then transfer your music from the cd to your computer. I buy an album from the iTMS. I then transfer the music from my computer on to a cd. We now essentially have the same products (I realize that I don't have the official liner or jacket and that the files on your computer have no restrictions while mine do) - I OWN the music on my cd the same way you own yours. While the sound quality for my music is lower, I am no audiophile so it really doesn't matter.
If you are an audiophile, of course you need to buy a cd. However, that really has nothing to do with DRM. I am assuming that an audiophile would NOT buy DRM free music from iTunes (or other online stores) that was encoded with a lossy format. In this case it is all about the music quality as opposed to the rights.