Do iPhones fully sync with Google services and other Web apps?
I have an iPhone 4. I love it. Google has a sync service for iPhone which will do #1 and #2. Your desire #3 is easily done through the browser. There's a built-in google maps app to fulfill your wish #4.

So, the iPhone can do what you want. 

That said, it sounds like you want an Android.

EDIT, since you asked about hardware 

After over 2 years of use, most of it without a case, except for a few minor scratches my iPhone 3G is fine. The only thing even close to degradation is a barely noticeable "stickiness" to the front main button.

My new iPhone 4 seems just as solidly built. I can't imagine these things falling apart without some sort of abuse.