I say don't feel guilty if you're buying the music. I've been through the same thing, though I was kinda young when albums were popular. But I have bought CD's for many releases that I already had on cassette tape, for the same reasons as you.
Doc_34465 and I had a recent "discussion" about this here:
http://tfproject.org/tfp/showthread....threadid=10200
But I could go on forever on this subject, and I have in the past, but I won;t now.
I'll just say this; If you feel that it's wrong, don't do it. I mean, honestly. I know several people that agree that it is stealing, but still do it because they are too cheap to pay for the music they want.
I'll just leave it at that.