The XM channels I listen to and that includes generous helpings of 80s on 8, are very deep in music selection. I like that, presenting a the sound of radio in those decades by the songs, not just hits. In essence this is a presentation of what radio was like then. To play just hits would just help distort the message of these decade formats, I mean who wants a suscriber service that offers only the songs that you can hear on regualr commercial stations?
The one thing that Sirius has XM beat on, so far, is personality in the programming. In particular regards, the way each service presents its 80s formats.
Sirrius has the best 80s pop culture anchors in the remaining orgional MTV VJs. XM has nothing, outside AT Top 40 reruns.
XM has the 80s format down music wise, they still have to deliver on the jocks. Remember 80s radio had DJs as coner stone and to be a successfuel 80s station XM will have deliver here.