I own all the Opeth CDs. I have Orchid, Morningrise, and MAYH with the Bonus Tracks, and have Still Life Digipack, although I've never seen it non-digi. I've downloaded 5 Opeth songs in my life: Credence, April Ethereal, Demon of the Fall, Requiem, and Benighted. I did own the CDs already but got bored so donwloaded some for ease of use on my computer.
I got some cheap CDs in HMV too, In Their Darkened Shrines - Nile for £8.99 and a 2CD death metal Relapse sampler thing for a fiver. I much prefer having the CD itself, just feels better, and any copies I do own I am in the process of buying the originals. It's got to the point where I think I'm addicted to CDs, if I ever walk into a CD shop I come out with several CDs, but hey it's worth it!