What are the advantages of tubes in a CD Player?

.....and are they better than solid state CD Players? I have had a few players. Rega Apollo, NAD 542, and a Cambridge Audio (actually a DVD Player). I loved the Apollo, but thought I wanted to go to a complete Computer Audio system so I sold it. Now I am contemplating buying another player. I hear the tube sound is so warm and non-digital sounding, which is why I bought the Apollo, well that and the look of it. So, should I go tubes this time? I was looking at that Raysonic 128 and the Shanling and maybe even the Consonance Droplet