I trawled around 3 local BMW dealerships today and have seen 8 different tourings. Initial impressions on how it works in different colours as follows;

Titanium Silver - Looked great, albeit in this colour looks most like the E46 version. Those with black interiors worked well - one had Lemon and I wasn't convinced it looked right.

Black Sapphire - Looked stunning when clean, which I guess will last around 3 hours! The Lemon interior looked better on this, but the dark wood didn't sit well with it at all - would have looked better with standard Titanium or Alluminium.

Monaco Blue - looked a bit 'heavy' and not as striking as the Black Sapphire. This one had beige leather and the interior looked a great contrast though.

Sparkling Graphite - I really like this on the saloon, but I didn't think it worked so well on the touring. Again, looks a bit heavy.

Arctic- I wanted to see one of these outside (as I have one on order, due next week) but I only found 1 and it was inside. Looked as striking as the saloon, but the extra angles at the rear accentuate the chameleon effect (green / grey / blue).

Finally, around the back of one dealers I found an M Sport model (Silver) and have to say I'm really glad I didn't go for it. I didn't like the front or rear treatment at all - the SE version looks much classier. Besides, I hate perforated leather which adorns the steering wheel and I feel that the sports set up and feel lessen the quality.