Originally Posted By Cal_Hawkeye


So far, I do think I want something with a decently tough and water resistant shell so that I can skip bringing an outer hard shell.


You still need a rain shell, so a "tough and water resistant shell" just adds weight and expense.

I would think for the Sierras, in summer, a down jacket would be appropriate, and maybe add a light fleece so you'd at least have one synthetic piece.
_________________________
Always remember that you are absolutely unique, just like everybody else. -Margaret Mead