I finally broke down and bought the Carenado Hawker 850XP and went to do my usual high-end model testing for FPS and VAS consumption. I know the model has both the full high end texture & cabin model but also a Lite model with lower res textures and without a passenger cabin. I ran several flights long and short to and from some pretty high end scenery which I've had OOM's with using models like the PMDG 737NGX and Aerosoft Airbus series. I was pleasantly surprised by not having any VAS or texture related OOM's but tonight, I had my first one with the Hawker. To trouble shoot, I ran through all the things I did during the flight that might have caused a VAS consumption spike, The culprit was my rather heavy handed use of the FSX Flight Planner. On my second attempt at the same run, same exact waypoints over a 550 NM flight, made it fine with no OOM's but I never touched the Flight Planner. As I've heard from many, that and some other supporting utilities within the Sim may eat up a lot of VAS right off the bat. I know that may or may not have anything to do with the above noted issued but I know that once I trimmed off my use of many of these utilities & functions in-game, my OOM occurrence has dropped dramatically.
Side-subject; So far as the Hawker, I am quite stunned by the beauty and overall performance of the model. Especially after all the negative stuff I read about it over the past year. The standard high res model runs at target FPS for me. By far the classiest Biz-Jet for FSX/P3D IMO.