The phone/tablet solutions have really improved. MotionX is a great app. I don't think they have the display, interface, and ruggedness issues as well sorted as a dedicated GPS, and connectivity can still limit their usefulness in some situations, but if you can make them work, they're pretty darn nice and you don't have to bother with map updates and all the rigamrole Garmin makes you put up with trying to keep your maps current on both the GPS and PC. Worth a try.
That being said, I've been a Garmin 60-series user since they first appeared (I think nearly a decade ago), and I'm hard pressed to think of a consumer electronics item that I've ever bought that has provided such incredibly good service for such a low price. I'm on my third unit now and every previous unit I've sold after a couple years of use for only slightly less than I paid for it initially. I've used it for everything - multiple bikes, multiple cars, bicycling, hiking, etc. It does many things that even the high-end Zumos still don't do. It does have a bit of a learning curve, especially if you want to do high-fidelity sophisticated routes loaded from the PC, but is extremely powerful and flexible.
The thing that turns most off with a handheld GPS is the small display, but I think it is something you quickly work around. I didn't think the display of a typical smartphone was big enough to be useful, but we've all adapted and/or bought reading glasses.
I may try traveling with both the 60 and the iPad/MotionX at some point. I'd like to compare their over-the-road flexibility and see how good the caching is.
- Mark