I think I see what you are saying Ecky.
So, I'm now thinking that even though the 3.27 would probably be the choice for the highest MPG it would be a lot of shifting to maintain that MPG number, as my drive can range from very hilly as it is now, to gentle rolling hills. At some point it may become second nature to do all that shifting, but not mentally relaxing. My drive to and from work is my time to talk to God or unwind from a bad day.
The 3.27 may be able to maintain speed, but only just. The 3.45 may be more of a set it and forget it situation. I'm used to downshifting on steeper inclines, but having to shift on almost every incline isn't what I was hoping for.
The 3.45 should still give some MPG improvement without changing my driving style too much.
I'm still open for opinions though.
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