Laphroaig is awesome. Other peaty favorites include Lagavulin 16 and Caol Ila 12.
My favorite bar in the wolrd is the Brandy Library in downtown manhattan. they have to have the best scotch selection on the east coast. its simply astounding. i implore you to check it out sometime if you're in the area.
I've had Lagavulin and I liked it. I did not know about Caol Ila, I will add it to my list. I have Arden as my next selection. I hear that is also peaty.