The iTunes Match service is actually very tempting even to me even though I get all my music from the best private music tracker (WhatCD).
The ability to turn up to 25,000 pirated music files into legal copies that I can download to any of my iDevices for only $25 a year is a great deal in my opinion.
And the fact that you don't have to upload your music files like Google Music & Amazon is a plus as well. It took me a good two days to upload all my music to Google Music once I got the invite at a constant 500KB/s.