A while ago, I picked up a copy of Xplane while there was a sale going on - as I'd played it a bit at Tims and thought it was worthy of purchase. I installed it on my Intel PC here, and soon after, version 8.21 came along for a $29USD upgrade. The interesting thing is that version 8.21 comes on NINE DVDs and installs to a whopping 60Gb! Is it worth it? Hell yes. The flight model is second to none, the graphics have improved heaps in the last version - as can be seen by these screenshots. Couple that with XSquawkbox and VATSIM and you can play online with proper air traffic control - using voice!. I have to say that it's the most realistic thing I have ever come across without actually being in a real cockpit.