The head unit is an alibaba job and not that expensive if you're after one but be conscious that if you have Nav+ already you'll need to change the dashboard trim for it to fit, not expensive or anything but a bit of messing.
Thanks! I'm just kidding, there's nothing wrong with the stock CD/aux player that is in the car. If I need navigation I just stick my phone on the dashboard.
Dibs the rims and headunit, if you decide to split.
I'm mega stoked on my 159 2.2 JTS