Need help with cd or dvd burning

I was thinking of burning cd,s or dvd's from my PC if some of you do that, what cd's or dvd's do you buy for best sound? and what site do you recommend offers high resolution or uncompressed sound? I currently have a bunch of memorex cd-r's 52x 700 mb 80mn, any good?
Or maybe I should just keep buying my cd's.
Thank you