Why buy pre-recorded? Borrow CD's from your mates or the library and record them to MD's.
I've had minidisc at home and in in the car for 4 years now and find them brilliant. You could even buy CD's from well known record stores who give no quibble refunds and record them before returning them (by the way this is illegal). I also find that vinyl LP's copied directly to MD's with no fancy stuff in the middle are fine.
It may be against copyright laws, but it's been proven that the people who copy music are also the people who buy it, which is certainly true in my case !!