Thanks all. I'd be going used and not until June/July once the Leon Cupra goes back.
@Hefty - 140i too small unfortunately otherwise that'd be my pick.
@Soul - would be second hand so if we go down that route will look out for adaptive suspension which I couldn't do without. Have it on the Cupra at the moment and I remember driving a Golf R without it and it was awful.
@umop3pisdn - ha, didn't actually think the GC would be longer! I'm going to show her that for sure!
The 430d would be the sensible choice but it's now or never to scratch that B58 itch!