BMW 2012 Professional Sat Nav DVDs

[c2mike]

I have a 2008 X5 and I think it is time to update the original Sat Nav maps. The BMW nav system is not impressive (5 digit post code, clunky menus, etc.), but better than nothing.
BMW are now selling the 2012 3 DVD map set (greater Europe in detail) for £175. I know there are much cheaper pirate options, but I'm happy to fork out the £ if the upgrade is worthwhile.
Does anybody know if the new map disks support 7 digit UK postcode entry? Any other worthwhile features?