Well the VM70 should be fine in the back, especially if you have tints in the back.
So HiJack, I would wait for further response from me, or take whichever route you desire. Given that the menus are crisp and clear, it seems like a nice unit.
As for earlier regarding multiple touch screens, I did not get that far yet. Spent my time swapping the VM70 out for the V70-XB and tracking down my problem. Next will be to hook the VM-70 up in the back and see how it goes!
Keep us posted and post pictures too!