I believe RetroPie uses this version:
https://github.com/joolswills/uae4all2
I personally think the Chips version is currently the best:
https://github.com/Chips-fr/uae4all2
https://www.raspberrypi.org/forums/viewtopic.php?f=78&t=102328
You can easily integrate this version into RetroPie with a little bit of work.
