I wish all of my bikes had triples but I live in a very hilly area. I have often wondered if a triple and a corn cob 11-20 on the back may be better than a double with a 12-28 due to the rotational weight of the rear wheel? Anybody got any thoughts or have any experience with this type of set up?

Of course your could have any size cog on the rear to meet your needs and you could swap those out pretty easily with the right tools.