And thanks Steve for your new water normals! Very cool water! For me it looks from higher altitude in DX9 mode very cool.
If you plan to buy FEX or REX, i think XG is needless. I use it with FEX, but the airport textures are not really stunning.. the moon textures are cool and the rain and thunder sounds lol but i wouldn't buy it again. Maybe you will find somewhere replacement textures/sounds for free. Water and clouds are looking much better with FEX and FEX gives you the full control about the texture resolutions. XG has a lot of stuff, but nothing has convinced me.
EDIT: A few more shots of the Prowler and Steve's water (i'm a Prowler and Intruder fan; shots are in DX10, but my max texture resolution is 1024):