For the Handel keyboard suites, the only version I have (and the only one I have ever heard) is Richter & Gavrilov. It completely satisfies, though having hung around GMG again for a while I've lately thought that I might pick up a harpsichord version for comparison.

Another set of baroque works that I've always enjoyed on piano is Scarlatti. Horowitz is justly famous here, but I most often pull one of the several Naxos discs, where they are doing all of the sonatas, each disc by a different pianist. Good stuff, and an easy way to take one's Scarlatti in reasonable size doses, and check out different approaches at the same time.
