Just setting up my wife's new 13 Red Edition.
I bought her a clear Spigen Crystal case, it has an anti-yellowing formula and really let that beautiful, deep red show through.
I also bought a Spigen Easy Fit screen protector - it comes mounted in a frame that you place the iPhone into, it can't move, so the screen goes on perfectly, no more on again, off again, shift it a bit to the right etc.
I also got the Spigen Crystal for my blue 13 Pro, when it finally comes (delivery is targeted for end of November!).
Also, the Pro case is marked as MagSafe compatible, not sure about the standard one, although wireless charging works fine - I am topping it off now, while I wait for my wife to get home from work.