For what its worth: My modest(until next week) system: E6600 OC to 3.2 on an Asus P5B with 2 Gb Corsair 800 RAM(4-4-4-12) and 8800GT using 180.48 + NHancer and set up using ALL of Nick Ns suggestions will not handle all of REX even using 1024 tex load.
So, I expermented and am using REX sparkling waves, custom Ocean color and airport textures with FEX with no problem. No smoothiness hit.
Thanks again Nick.
Jack S
