We've finally made a decision and will be ordering today the following:
Insignia SRI VX-Line Nav 160 ECOflex
in Technical Grey
with Exec Pack (BT, Auto lights wipers Climate and Dimming Mirror)
I would have chosen the sovereign silver (I think it's called that) but we have to have small company logos on the side, and the grey hides them the best
I'll miss the HIDs from the Mazda 6 and the twin exhausts, oh and 25bhp but the Insignia is a nice place to be and feels much better built than the Mazda.
I took out the flexride option as a) the ecoflex rides lower anyway and b) the extra cost just wasn't worth it in the end.