Perfect

You need to change the water though. Max 2x is a very expensive setting, in terms of FPS. I'd recommend you to stay at High 2x.
For the terrain settings, you should probably limit the ground texture resolution to 1 meter instead of 7 centimeters as it is now. For the autogen, the setting is good, but you probably want to write the autogen tweaks in the FSX.cfg to make the autogen less heavy on the FPS. I'm referring to the two lines in the [TERRAIN] section (you have to add them, they don't exist by defaut):
TERRAIN_MAX_AUTOGEN_TREES_PER_CELL=1000
TERRAIN_MAX_AUTOGEN_BUILDINGS_PER_CELL=300The values are low, but it's because your CPU is not very fast, so it would not be a good idea to raise them too much. The good thing with those lines is that you can keep you autogen slider at "very dense" in the game, the autogen will still look dense close to your position.
For the AI traffic, it's up to you, but remember that airport vehicules can be very heavy on the FPS when you get close to big airports, so keep that setting low, that is minimum or disabled... but really, just try various settings, and see what you get (in terms of performance) in your favorite places

One last thing: it's probably better to disable the AntiAliasing in the game and force it through the video drivers settings. Do you know how to do that or do you need any exlanations ?