I'd never give up my CD collection. Even though some of the 24 bit so called hi-res downloads claim to be better I've never been able to tell the difference between the 16 and 24 bit files and neither of them sound better than a CD.
It's more fun going through the stacks and stacks of CDs and DVDs and they constantly get new stuff in. They had a huge collection of concert DVDs come in a while back and I think I made three trips and came home with a stack each time. More fun than trolling through stuff online!
Of course, but, where's the fun in that? Besides, most of the time I don't know what I'm looking for until I find it...