Northern Brewer, hands-down. They have sooooo many different ones, and they tweak the recipes over time, and keep adding new ones. I brewed an NB kit or two every week for a yr and always felt like there were more I wanted to try than I had time to brew.
Primary: Harvard St Rando Juice Wine
Clarifying Banana Wine, Strawberry Kiwi Wine
On Deck: Rhubarb-Blackberry Wine, Dragon's Blood, Homegrown Cascade Pale Ale, some kind of Saison