whoops, 0.65 of course - guess that was some sort of automatic conversion in my brain :p
GI detail was 3, with a sample quality of 4, filter: narrow cubic. I had to increase the atmosphere and cloud quality a lot to get the clouds near the mountains look good, but otherwise the render engine in TG2 does a fantastic job.
Thank you all for the praise, wasn't expecting this many replies

I've used TG0.9 for a week or so, before TG2 came out and jumped right on it. I'm really looking forward to my next project where I can pay much more attention to the surface layering, now that I know how to do it. Most of this project was spent in finding a good workflow for myself and trying to learn how stuff works, especially the water and displacement shaders.