Well after all that fannying around being indecisive I'm afraid the boredom and safe version of me kicked in and I've gone Graphite to match what I already have.
I got a sample of the purple and spent a lot of time looking at the black (and I just love that Volcano Orange McLaren colour) but it seems at the end of the say I'm perhaps not as adventurous as I'd thought

Now it's a waiting game, and living for a little bit longer with my 72HC "soundbar" !!!
Thanks for all your feedback guys, it was fun.
... steadily getting excited now ...