I’d recommend RealFlight G3.0.(448) the last update before G3.5. The physics in G3.5 aren’t as good as they were in G3.0. Just subtle things but it’s those subtle things that will bite you. Prime example is in RealFlight G3.0 as you apply power the planes would pull to the left, as they should and do in real life because of torque or P-factor (I don’t remember which). But, in RealFlight G3.5 the planes pull to the right! Practice with G3.5 long enough and you’ll compensate for a plane pulling to the right without thinking. Then when you get to the field and your plane pulls to the left – at the same time that your applying left rudder because that’s what you’ve been doing all the time you’ve been flying on the sim … your instructor, or you, will have to be pretty quick on the sticks to save your plane.
The planes also don’t stall anymore, or snap and they’ll keep running when you land upside down … funny as h&** to see a plane scooting along the ground upside down! Of course KnifeEdge has refused to acknowledge any problems. But, they did say that they were “looking into” the complaints.
With all of that said, I think that KnifeEdge Software will eventually fix the physics issues. If they don’t, sales will start to plummet as more and more people publicly complain about the poor physics.
RealFlight offers more planes, more fields and it’s helped me more then I can say. Get RealFlight and just don’t upgrade to G3.5 until they fix the physics problems.
One other tip … check
www.knifeedge.com/ for their list of compatible video cards. Even with a system like your’s you may not get all of the features of the sim without a compatible video card, most notably shadows.