I haven't seen any comments by users, but it should be a great engine. The .46NT certainly is that. I would suggest going ahead and getting it if you have the extra $40. I think the Raptor is designed to be a trainer that you can grow with, right? You would enjoy the extra power once you began flying some. Actually, the price of the 52NX isn't that expensive compared to others like OS. But, if you decide on the .46NT you will be getting a great engine with a lot of power. I don't think you can go wrong with either engine, but the 52NX would give you more for the Raptor and maybe your next model later on.