As already said: it's a personal choice but I would go for the following options:
1. Leather: most of the time you're in the car, so you will definitely enjoy it every time you step into it.
2. Navi Pro: same as for leather, you will use and see it every time you start the car. Next to that it's nice to have a screen with a size like the Pro. It will upgrade the interior look of your car for sure. In my opinion the Business looks a bit 'cheap', caused by the big plastic part besides the screen.
3. Bigger wheels will definitely look better but besides that what will be the benefit for you? Only when you walk to the car you will see them and I don't think it's worth the money in that case
