Funny thing - when the 13-14's came out, all the 11-12 guys were happy they had theirs and wouldn't have dreamed of trading it in on the newer one. The differences between the 11's and 13's are minimal, and the improvements marginal, if any. At least the 15 is an advancement in technology.
I agree, but this is the internet...
My favorite new model is the one that I bought (a 2011 Brembo GT):
I am shopping for a 2015.