Kamil, I'm a windoze user but abandoned fsx almost a yr ago. I wouldn't go near pmdg, as flying @ 10fps does not interest me. I agree it's a pity Rex is not out for linux or apple yet, but frankly we are lucky to get Rex at all for xp, so quickly. If I want real ATC I use vatsim. With Rex, assuming it performs as advertised, I reckon we'll be set! Great planes, nice cloudy skies and Norcal for eyecandy. I don't need orbx etc, too busy flying my plane to gawk at fps sucking buildings - but there are already great 3d sceneries- xpfr Paris (see my paf video), Corsica (ditto), eddm amazing, inside passage, OLA's work, javier's LESA etc, plus god knows what surprises xaviation and Ben have instore for us. Good times. But not if you're with Linux, bummer. Maybe time to dualboot?