I would suggest you will see better load times but not better performance from the SSD. That has been my experience.
Beyond that, it may be time for an upgrade or you'll need to decrease your "clutter/Grass", "Chimney Smoke", "Terrain Textures", etc. I'd remove Heat Blur all together. A number of those items are great when you takeoff or land but do nothing for you at 20k ft. Of course thats if your a jet guy. Props I understand the desire for it, but there are still realities to your systems abilities.