Search this forum and others and you'll find lots of debate on this subject.
In short, each generation has it's pluses and minuses. Many swear the S is the only way to go. I like my base. To each his own is the bottom line. The best thing to do is to drive one of each and see which you like better.
One caveat, as you do your research, you'll find ad nauseum discussion on the intermediate shaft bearing issue. On '06 and up (IIRC), the "cheap" retrofit IMS bearing can't happen, as the engine has to be rebuilt entirely.
Good luck!
