Bach Recommendations?

With the exception of Coldplay's brilliant new album, I have found myself listening to little other than three of Johann Sebastian Bach's greatest works. I have found myself enraptured by his Cello Suites, Goldberg Variations, and Sonatas and Partitas for Solo Violin (performed by Rostropovich, Perahia, and Milstein, respectively). I reckon that means I like the guy. Anyone have recommendations for my fourth Bach album? And then a fifth?