Wow, I'm hesitant to post because my flame proof undies are in the wash but what the heck.
First, I own both a Motorola Droid (1) and an Oregon 450.
I started caching and found my first 150+ caches with geobeagle and some other apps that cobble together a solution. Now that the Android app is out it's on my list to buy.
My Droid does a great job for those times I have a few minutes between appointments. The downside for me was accuracy in the woods and limited battery life. I chose not to place a cache having been told about others experience of hundreds of feet off. One was over a thousand feet off. (no idea on the details just hearsay from long time cachers at a coffee)
My Oregon is awesome for those days I like to go for an all day trip. Endless batteries, thousands of caches and easy to read leaving my phone free and charged for emergencies. (and yes I'm prone to them) This is peace of mind for my family and myself. My hides were placed with the Oregon. My understanding is various GPSr units all get you within roughly 20' of the cache. Sometimes better, sometimes not.
So my feeling is whatever floats your boat and remember what they say about opinions. Everyone has their device of choice. I have met folks who are die hard magellan, garmin, delorme etc. Frankly it's what works best for YOU and what makes YOU happy.
My reading between the lines here is folks are concerned for the safety of your smart phone and trying to share their experiences of the pros and cons of a stand alone GPSr.
It's your choice what you do with that info. You can ignore it, file it away, take it under advisement or laugh at it. No one will know the difference down the road.
You'll feel your way and decide as your caching experience matures. I'd be interested to hear your thoughts in a couple hundred finds just out of my own curiosity. I chose to use my phone to make sure I was going to stick with it before investing any big money into a GPSr. When I decided I wanted a GPSr I read and listened along the way and made the choice right for me which is ultimately what you'll end up doing down the road.
CC