I was gonna buy one before I bought my ST, the interior was a real let down for me, it all felt really cheap with hard scratchy plastic everywhere. I feel the ST interior is better IMO
If you do buy a MK7 you can get a Sony upgrade which would improve things a little I guess
I also looked at car computers you can get with satnav etc.. for around £600 that can be installed in the dash and look OEM with ford logo on the screen and menus.