Get the Pro Media Pack. Delete other options like VDC if you have to. It is so much more than just Sat Nav. Beautiful widescreen display with split screen functionality (so you can have, for example, media/radio info on one half and journey computer on the other), full black panel dashboard (looks and functions so much better), voice control (including full address entry in one go, very impressed with this - also voice select of artist, track or album from your iPhone library), Connected Drive (send addresses to car, remote control car, use Google Local search within car, BMW Assist emergency button...)
Also will recoup about half on resale. X models without Nav are like X models without Xenons... Batman without Robin (bad example maybe as I love the Robin-free Nolan films)
