I voted for the Lagavulin PX. Partly because I tasted it for the first time recently and I have an open bottle within reach
I think the Lagavulin takes the character of the standard 16yo and takes it in a new direction. The PX finish dominates for so long it is difficult to pick up the iodine of the Lagavulin through it. It definitely challenges the Lagavulin drinker and I bet a few don't like it because it is so different. I love it.
I have fond memories of drinking Laphroaig 15yo and I intend to try some again soon. It tamed the savagery of the old 10yo but still retained all the taste. It just made for a more subtle dram. I don't know how the current version compares with the current 10yo.