I thought I would massively miss not having iPod integration in the car when I brought the ED30 with the RNS-510 (as if it's made by Apple I normally have to buy it, I currently own three iPod's and an iPhone 3G :embarassed:). I had the Dice kit for my X5 which on the Navi gave the track/artist details on screen.
But TBH with the built in Hard Disk (18GB left for music), SD Card Slot and support for MP3's from DVD (another 8GB on DL Disc's) plus 3.5mm AUX jack you just don't need the iPod in the car.
But if you must have the integration at least for a few hundred euro's you can get the full integration with the new MDI kit that isn't available with any of the other OEM VW headunits.
So to me 2 out of 3 improvements is enough to justify the cost to upgrade.
