Yuri's Thunderstruck Pumpkin Ale seems to get the best reviews around here. They use real pumpkin which is good but causes a large amount of sediment.
This is a 6 gallon batch so you can scale it to whatever size you are looking for.
Here are a list of some to try before you try to make one.
Personally I enjoy the pumpkin variety in the fall and stronger warmer brews in the winter(Scottish Strong, Barleywine, Heafty Stouts) Have you looked into any of the Brooklyn Brewing Kits. They are a 1 gallon Brew in a bag(BIAB) and they make some pretty good beer. The Coffee Donut Stout is very good. 40$ gets you what you need or you can part it together from your own LHBS
Good Luck, Have fun and keep the ?'s coming