Well if the rumors are true about Apple coming out with a seven inch iPad then I think the ultimate GPS unit has arrived. I have a 550 that works great but a larger screen would be nice with aged eyesite. I can't see spending $800 for a new 665. I have the Garmin app on my iPhone that works beautifully. Hopefully the app will a available for the new iPad. Would be nice to integrate a GPS and everything I use a computer on the road for with a single unit. If so, it shouldn't be long before someone makes a waterproof case for it.