Aaron,
I own a lot, and like a lot.
The Prosody Handbook is one I admire that often doesn't get mentioned as much--I like it's discussion of timbre, for instance.
But in terms of covering the meaning of meter and form and the significance of metrical variation (even if Fussell is too ready to count spondees or pyrhhics where I think it's likely just an iamb), I haven't come across one as good as the fossil.