Zinertek ultimate water advanced and it's really nice for the FS9 version. As for REX on FS9, that's because FSX has upper graphics details than FS9 obviously. Any water addon either bad or good will look better on FSX than FS9 due to FSX's better graphics. As you said, REX FS9 water is completely different textures than REX FSX. Certainly many people including me wish FS9 have same water graphic textures like in FSX. I like FS9 because it uses less performance to run pretty nice, plus all my addons are for FS9 lol. Anyway speaking of REX, what's the difference between REX FS2004 and REX FS2004 overdrive?