I just got Cinemax, very impressed by the numbers of channels something like 5 HD channels and very good HD quality, close to Blu Ray quality. Not bad for 13 bucks a months I say.
HBO is the best imo. At school I had HBO and max since they played the best movies and HBO's shows are all great. Californication is on showtime btw (also currently working through s1 dvd and its great).
but now I live at home and I get every prem channel
I have HBO right now but I am about to switch over to Showtime for Dexter. The HBO shows I like to watch are all ending, Entourage was a massive failure this season, Hung was good as usual.