Laphroaig 1/4 Cask. Have heard nothing but great things, but again, I've yet to try it. I'll snag a bottle when I pick up the Bruichladdich.
Here's a hearty vote for the Laphroig 1/4 cask. Easily the best value single malt I've tasted, and I've tasted a few. If you love peat and smoke, and you don't want to necessarily spend $150 a bottle then this is the dram for you!