been flying fsx also, I have downloaded a spit9, pony, corsair, and a cirrus all from simviation.com. not sure if I am doing something wrong but none have gauges which they are all supposed to. the corsair I couldnt even get to take off, just groundlooped no matter what I did. But I did download a cirrus sr20 which is a blast to fly, found an upgrade for the gauges also.
I tried the vatsim, but killed my computer, fsx was WAY slow, and it would disconnect me in the middle of a flight
I use mainly the simviation.com and flightsim.com, there is also surclaro.com but that is mainly a payware site. would like to download the eaglesoft sr22t looks to be a good plane.