I use whatever I can get a spindle of 50 for £10 or less
But to be fair most of mine get data written to them. As far as cdrw's go, I don't really use them much. Most of my audio cd players don't read them, apart from a more modern one which isn't mine. I have never had a problem with generic cd's - I used to buy sony ones but found them to be unreliable - randomly refusing to burn??
Cheers
Andrew