I think they are both good concepts and look good, but I was thinking 2 things
1) The icons should be the same regradless of their size or layout
2) Make it editable by the user. They can easily choose the size of the text and either they can choose the size of the icons or the icons can auto-adjust depending on the text size.
Another idea would for it to switch interfaces depending on if the car is moving or not. It'd be preferable not to have to read while the car is moving