Yeah, you have a couple of options in that price range. You could go with the Alpine ICS-X8 App Link Radio. The ICS-X8 will interface with the MFD too if you use the Alpine connection harness. It basically uses the apps on your phone, so you can use google maps to navigate, it also therefore uses streetmaps navigation if you want.
I fitted one last week Thursday and the chap is very happy with it. I could do you one of those for £530 delivered. You would then need the Alpine harness which is around the £ 70 to £80 mark. This will display info on the MFD and allow you to use your MFSW buttons.