Though I don't think I'll be drinking pumpkin beer for a few weeks, when I do, I'll be buying everything listed in the top 10, as they're all beers worthy of your dollar.
For the pumpkin pie experience in a bottle, you've got to get Schlafly or the Stevens Point beers. For a solid all-around pumpkin beer, buy the Cigar City, Southern Tier, or Heavy Seas brews. Want a strange pumpkin beer experience? Hitchhike to Colorado to get the rare Paradox pumpkin pepitas beer, or drive to a liquor store like a normal person and pick up the Elysian coffee one.