I have a similar impression to Looigi's, namely that Garmin GPS units cannot compete with smartphones around the services and features you're talking about. The smartphones (and my experience is iPhone, btw) are simply easier to use, more versatile, more graphical, and offer more features. Apps like Motion X GPS Drive not only provide tracking and turn-by-turn navigation, but also put destination searches just two or three finger-taps away, so that if you wanted to find a bank, a campsite, a wifi hotspot, or a point-of-interest, you could literally do the search, call them, and navigate there in 5 taps, without typing anything.

Garmins, like the 500 I now use (after trying and finding wanting the 800), as Loogi said, are great for doing those things you, the OP, don't actually need one to do! I do like the ride data, and while I could capture that on my phone with Strava or something similar, I also like the low risk of keeping a durable GPS unit on my bars rather than an overly large, expensive, and comparatively delicate cell phone.