I still buy 2nd hand CDs and, if I have a choice between buying a 16/44.1 download or buying the same content on CD, I prefer to buy the CD. I won't deny that, for the new releases, I do have a twinge of guilt, from an environmental perspective, so I may change before CDs stop being produced. In either case, it won't stop me buying 2nd hand CDs of older albums, though.
I'm losing interest in the X7, simply because I feel it is lacking clarity in its intent, but whether I buy an X5, DX90, or whatever, I will be playing some 24/96 and a whole heap of 16/44.1, simply because I own so much of it, like Mimouille.