I actually don't have more than a box of any one cigar at the moment, so I guess the answer would be Cohiba Siglo Is and IVs.
The latter box I just haven't broken into because they only just turned a year old. I'm trying to hold off until at least the three year point, though I may smoke one soon and one in a year to check on them. Matter of fact, I may do that tonight.
The former box I'm saving to smoke one a year on the anniversary of my son's birth who we lost earlier this year when he was born prematurely. We have a baby girl on the way soon and I'm planning to get a box of Siglo IIs with her birth month to do the same thing with.