Thanks guys, you're talking me into it! It's good that it also displays the lanes to get into in the motorway, as opposed to just eg an arrow.
Also I guess there may be a fix at some point for the polarised sunglasses issue, e.g. Film over the projector etc.?
If I add it, I'll just be adding one more thing, which will be either:
-M Sport brakes (my 135i had big brakes, and I'm not sure ill be happy with the standard 330d brakes, or are the standard brakes actually good?) (£515 I think)
-Surround view/rear view cameras (also £800)
Any advice appreciated