Hey Dr. Tomcat. Welcome to the V! (Or 'The Madhouse' - some of us really prove it to be just that

)
But I don't think you should brag over your graphics or performance. They're really not that good. There are people on this forum with lesser systems that produce images that make your screenshot look like something my two year old son put together.
So you think you have everything maxed in FSX? Do you just set the slider to max or do you also manually edit settings in your config file? And you're getting 20 FPS in clear weather over water ... I don't think it is that impressive if you ask me. If you would fly over Manhattan in a massive thunderstorm, with 100% traffic, 3D clouds and God knows what else you can come up with, and still have a CONSTANT 20 FPS ... then we would be mildly impressed.
But as soon as you're over the
Amazon River and you get a little trees in sight you drop 5 frames? With default scenery and a default plane? Please ... stop bragging about quality and performance. Follow Wingo's advice. I can get this kind of performance (and quite possibly even better) out of my 7800 GS on AGPx8.
Seriously, if you like to see what an 8800 can do check out
this thread. But having a nice card doesn't mean a thing. You need all components to work together, ask anyone. See if you gain some performance and image quality by reading
this.
Good luck!