I will easily qualify for E for 2012, but I will land well short of SE. I could probably have reached SE by using miles that went to CO instead even though I had already reached the top tier.

My question is, given that I usually fly upfront, does it make sense for me to actively track my miles in 2012 to get to SE? I checked the AC web site and it seems the most meaningful differences between E and SE are a couple of thousand extra bonus miles and more eUpgrade credits, neither of which is very significant for me. Am I missing something?