I'm kind of agreeing with many here that we should eliminate Skip indeed for presenting us with such a choice.
But aren't these two, Saruman and Boromir so much alike?
Both were great heroes of their days and both were confident they could win the war themselves in a way they saw it fit. Also they both had to perform a treachery on their friends to succeed - and they both died because of that (remember that most of the heroes do survive the war in the LotR unlike in more modern stories).
I do like Boromir as a person more but I find Saruman much more fascinating. And also because there will be an ample Boromir -fan club around I will try to even this out a bit.
++ Saruman