Where is the most clear and concise exposition of the spectral theorem for self-adjoint operators on Hilbert space?

Question

This question is certainly subjective, which may warrant votes to close. I'm simply looking to find the "best" written exposition of the spectral theorem for possibly unbounded self-adjoint operators (and so, perhaps including the proof of the spectral theorem for bounded normal operators). The hope is that I've missed a gold nugget in the literature.