I'd like to try an Example Design for Avalon-MM Slave. Which one would you recommend to try with?

Hello,

You can run it either by simulation, or by real-time on board.

I would recommend using Nios II as a processor and connect your custom component to it. With a simple C application, you can test this custom component.

Please refer to this tutorial:

ftp://ftp.intel.com/Pub/fpgaup/pub/Intel_Material/13.1/Tutorials/Making_Qsys_Components.pdf

Thanks