I just got the tm 900 last week. Picture quality of this unit is simply unbelivable. Very natural colours and extremely sharp picture. The manual functions are all great, including the really nice multifunction focus-ring. So on the picture side, could not be more pleased. However, there is of course the fan issue which, i'm sorry to say, is still an issue. I don't have any experience with the previous 700 series so i can't really compare the two, but the fan on the 900 is very much audible. I would go so far as to say, that had it not been for the ext. mic input, i would probably consider returning it. I find it very strange that they didn't take this more seriously, as i am sure this will give the 900 series the same ongoing "fan-fear" as the 700.
One feature i would like though, is to have it be pal/ntsc switchable, or just 50p/60p switchable. This because 50p footage has the jitters when played back on pc screens, as most screens have a refreshrate of 60hz, hence optimal for 60p. The difference is very much noticeable. Plus, 60p is much more workable for internet use; youtube, vimeo etc. all use 30 fps which makes 50p look jerky. Hope they release some new firmware that makes this possible.