After doing some research, I decided to get the Digilent Digital Discovery and give it a try.
I was not disappointed!
Here is an overview of all signals captured.
Here is a zoomed-in view. I've added notes in yellow showing which CPU instructions are being executed.
For reference, here is the disassembled code that is being executed (look at the address numbers to help match things up).
Conclusion? Money well spent! :)