WXGA Resolution Projectors and Simming

I am considering setting up a pair of side-by-side sims in my basement, for formation flying and competitive dogfights with friends. I've been considering my display options, and I think that a projector and TrackIR will provide the best immersion per dollar (though I suppose a television could prove to be a good option as well). I've been looking at short throw projectors, and it seems that most that I find are 1200x800 (like this nicely priced option). Would the linked projector be suitable for simming on? Is 1200x800 sufficient for simming? If not, are there any 1920x1080 options that aren't crazily expensive? I appreciate any advice.