Bookman mentioned this one-Southern Tier Pumking, New York
IMO it ends the debate, I challenge you to try this beer and not like it (even if you hate pumpkin beers) and rate it as the best (if you do). I have never heard of this brewery before, but my bro was in town last weekend and we hit Brasserie V for brunch on Sunday. He ordered it, I scoffed, he let me taste it, I apologized. Best. Pumpkin. Beer. Ever.
He works for a large East coast beer distributor in the craft/imports division so I shoulda known. I was jealous even though I was drinking Delerium on tap. Its 11 bucks a bottle (big one), so it ain't cheap, but its amazing. After that taste, I'm looking for more Southern Tier, any variety.