I have recently had the same problem (figuring out the best choices for emulators for each system). I think it would be great to have some kind of collection in the wiki which lists recommended options (including emulator version) for each platform (Pi and Pi2) and system. I would gladly help working on a list like this, not sure who do talk to about permissions to do this.
Another possibility would be to just use the default values for the new emulator selection mechanism. I am not sure if those are currently just semi-random or follow a specific pattern. Also those can not be system specific as since the SD card images are built from the same source I think…
I just did a standard binary based installation for all my emulators – most of them work fine.
I did however get very frustrated with the controller configuration in gpsp as it wasn’t saving at all. because of this I decided to install lr-gpsp, however now it still uses gpsp by default and I’m not sure how to change that. Can anybody help me out?