G3.5 or AFPD with a little tweaks is absolutely amazing, no sim is picture perfect though. It really depends what you looking to use it for... If you really want to play online get g3.5 but if your looking for amazing graphics and physics afpd will do and 3.5 but I think the graphics are slightly better in afpd, but that's my opinion, fsone? I don't know if it's any good because I've never played it. Reflex XTR is also a great sim.

Regards,
Matt