Best model for Whipser add-on on CM5

Any one knows or did some kind of benchmark to find out what is the best model for Whisper with a CM5? The default one that is the most suitable for CM4 is tiny-int8, but I think we could be able to go bigger with a CM5.
I upgraded my CM4 to a CM5 on my HA Yellow yesterday, and I would like to tune to a more adequate model that uses better the CM5 power.
Please consider RAM quantity if possible. My CM5 has 16GB of RAM. I know for now there is a limitation, but it should be solved in the next HAOS release, so a model that trades-off speed of RAM would be nice since I will have a lot of RAM.