Sugested Add-ons etc..

This is my system AMD Athlon 64bit 3200+, Gig of Kingston 400mhz ram and a Nvidia Geforce fx5500 256mb Ram video..Well I need some help.. I am on a mission to make the level of reality and scenery etc as real as I can get her.. (ugh) :( I currently have the latest ActiveSky, Ultimate Traffic, My Traffic which is currently uninstalled since I fly VATSIM now.. Let's see Flight Enviroment, ATR 72-500 from Flight One (sweet rig), Real Air's Marchetti SF.260 and the Spitfire.. Love the way these planes feel on my Force Feedback 2 Sidewinder joystick.And I have upgraded Alaska terrain with FSGENESIS mesh and Canada also with Ultimate Terrain...U.S. Alaska, and Canada are my main mission's right now to focus on...Sorry I am about fried tired been up all night may seem to be babbling (grin)As far as scenery etc.. I am at a loss to what to try to get ahold of next and was wondering if any of you veterans out there could help guide me to making the right decisions that I wouldn't regret..I am gonna ask an ignorant question. But does the only thing terrain mesh effect is elevation or does it also effect the coloring of the terrain etc?P.S. Gotta lot of flight sim stuff wan't more and the cars about broke down (ugh)... I am addicted Thanks,