If this is a 40-sized plane and you don't already have a snot-load of nose-weight then go for the OS46. All the other engines are pretty heavy and that weight will offset the extra power they offer.

Besides, if you're going to put a 60 in a ship you might as well put a 90 in -- they're generally the same external size and weight but have more power so you can re-use them in a wider range of planes later.

But, for a 40-sized plane I'd stick with the OS or maybe a Thunder Tiger 46Pro