Based on your suggestions, I made this (very long) poll so we can narrow down the results to just one candidate. Sorry for the huge list but I did not want to leave anybody out. I would like to stress that GEFS is technically limited for now and that simulating complex things like the Shuttle flight and re-entry or making a jetliner interesting to fly (Instruments, VOR NAV, ILS, Hydraulics, and what have you) is not yet achievable. I know there is a lot of demand for "big and fast" but keep in mind you don't fly an A380 as you fly the Piper Cub. That being said, make your selection and click on "Vote".