According to the adds the new premier was supposed to be faster and more agressive... Uh, nice marketing. I rode the '03 at the start of the year last year and the '04 at the end of the year and into the start of this year. It is definitely not faster or more agressive. It is, however, a nice board. I really like riding it behind a huge wake. The subtle 3 stage is predictable and smooth. I say huge wake, because it doesn't pop very hard. If you are looking for a moderately fast and snappy board go with the era. If you are looking for a super smooth, forgiving and stable ride go with the new premier. From what I have heard the new base on the premier makes it faster (they killed the old sticky jib base), but I don't yet know from experience. I still love both premiers and think in '05 I'll probably go back to the new premier (I'm on a Substance right now, which is also worth checking out. More similar to the old premier/era, but faster and more pop).
Just my opinion.