I've just finished my IR with 25 hrs FNPT1 and 25 hrs Duchess. Just my opinion, but the beauty of the sim is you get to learn new things in it and make loads of mistakes before doing it for real in the aircraft. I can't believe that 40hrs in the best sim in the world would prepare you adequately to get it all right in an aeroplane for real though!
On the other hand 25hrs FNPT2 is presumably better than 25hrs FNPT1?
On the other, other hand my school lets students fill their boots with gratis solo practice on their FNPT1, and it was absolutely invaluable. Feel free to PM me if you'd like any more info.