Actually, those are my screenshot settings.
For normal flying, I use either 1024x768x32 with Antialiasing ON, or 1152x864x32 with Antialiasing OFF, this usually gets me around 25 FPS in dense scenery.
If the weather is thick with cloud, I have to get rid of the Antialiasing or FPS goes down the drain. That's when I switch to 1152x964.
If the weather is fine with a few clouds, 1024x768 with antialiasing on gives me 25 FPS, looks fine to me, and is good enough for screenshots really.
I mainly use the above mentioned mode (in my reply above- 1152x864x32 Antialiasing On) when I want a really nice screenshot.
It's a bit of a pain having to switch resolutions depending on the scenario, but good graphics card here in Australia is over $800, so I'll put up with it 'til prices drop.
I've tried a lot of promising tweaks, but for one reason or another, I haven't had a lot of success without losing graphic quality in fs9.
I did replace my water textures, I cant remember where I got them. They are a re-edit of Bill Lyons and friends excellent water replacement textures. Re-edited by spitroast and Lemoncat.
I tried the FPS fix for clouds, ie. new cloud textures, it worked great, but..... the quality went down too far for my liking, many wouldn't notice though.
I tried the AUTOGEN fix, where you basically delete the contents of the autogen folder, thus removing all the restaurants and signs for the shops etc. This didn't have any measurable impact at any level that I could see on my rig.
Game settings do have a major impact:
Draw distances, Autogen density, cloud density/detail, screen resolution and effects seem to have FPS impacts I can control and balance, while maintaining Maximum terrain detail, texturing and aircraft rendering.
hope that helped