I've been meaning to recommend this for a while, as it's been my go-to ale since I found out about it a few months ago:
Bellhaven Best
It's like the Scottish version of Kilkenny. It has a nitrogen widget, like Kilkenny and Guiness, but it's fastened to the bottom of the can instead of a free-floating sphere. I think it works better when it's at the bottom.
It's normally $2.40/can at BCL. I think it's on sale right now for $2.10.