FARB!!! ALL FARB!!!
Seriously, the term 'ultimate Viking movie' has me interested already. To date, the best one I've seen is 13th Warrior. Keep in mind, I've never seen the Kirk Douglas/Tony Curtis flick, but I hear that one was also well done.
Best 'Viking' book? For me, it is Bernard Cornwell's 'The Saxon Chronicles'; a 6 book series. They are not called Vikings, by their own or anyone else's words but that is what they are.