How helpful would it be to have taken 3-4 graduate level classes as an undergraduate, with an A in all of them, when applying to physics graduate school? Please answer any of these more specific questions below if you have time,

1. How helpful are graduate classes (assuming A's) relative to other things such as publications, and REU experiences?

2. How much better do graduate level physics classes look than graduate level math classes?

3. Are there any graduate classes that would stand out far more than others?

I got an A in a graduate level PDE course through the math department last semester, and am taking a graduate-level math-methods-in-quantum course through the math department this summer. I was also planning on taking GR through the physics department when it's offered.

4. How much more attractive of a candidate would this make me (assuming all A's) than had I not taken these courses?