I think it depends largely on the type of sound you are going for. Even though I have used the 57 on snare a lot myself, more recently I've been favoring a SD condenser a bit off to the side pointing at the shell. A close-mic'ed 57 tends to pick up mostly the top head with little body or snare sound. When I'm doing the 57 thing, I generally rely much more heavily on the overheads for the snare sound. But I'm also usually going for a more real/roomy sound, not a tight, dry kind of thing.
Oh, and I haven't used one, but the Beyer M201 is supposed to be a nice snare mic.