I've been having some great luck with the Aerosoft Airbus Extended A318/A319 models. The cockpit looks outstanding in the highest resolution, all of the instruments are readable and all of the switches and controls work properly.
Given the complexity of this aircraft, it has really good FPS with no major jitters. I also found I didn't get the awful slowdowns in certain clouds with AS16 either.
Currently the most immersive model I own and I would say the one with the least issues too. I can't actually think of any. I don't use GSX or FSCrew with it as I know they will degrade performance.
Frames wise I'm getting 30/94 to 50/94 depending on airport/traffic/weather etc. Even departing from KBOS with a half full airport, heavy snow and very dense clouds coverage the worse it got to was 27 FPS and that was only because I was taxiing behind 3 other planes in a snow storm
My specs are in the footer, Currently on the lastest Nvidia drivers, FI 1.71, latest Oculus update (updated itself yesterday)
Thanks, Alan.