FSX/P3D. Now quite naturally, VirtualCol is not the best aircraft developer on the virtual airfield. But that's not to suggest their work is bad by any means. And when you consider the fact that they develop aircraft no one else is considering at a very, very reasonable prices, it's no wonder they are so cozy in the niche void they fulfill. The Cessna Crusader for FS9 was one of their better releases and I personally put many hours on it before departing FS9. They have now upgraded it to FSX and P3D and you can own it again, or for the first time for just under 9 bucks. Like I said, reasonable.