To be a little blunt but straightforward, really any engine is good as long as it has research put into it.
I dont trust SH/HSP engines, from past experiences, but generally all engines are good.
Companies like OS, Novarossi, RB, Sirio and the like, they have HEEEEEEAAPS of research (CAD designs, track testing etc) behind them, and it shows in their popularity (and price
So get an engine that you feel you can trust, that you can get support for, and that YOU will be happy with. You dont want to get something that doesn't work too well, and you are not happy with