right for you.
Currently my cell phone budget is larger than my computer budget. I try to stay out from in front of the computer (for non business purposes) as much as possible. I also don't like carrying multiple items nor have i bought specialist devices to help in the different areas of my life. Right now the dash is my GPS, camera, mp3 player, book, newspaper, video game device, phone and PDA. The phone that replaces it will have to do all the same.
Starting from scratch buying specialist devices would be more than the estimated $800 price tag, and knowing me and would run into situations where I would need some sort combination of those devices (email the location and I will walk there using GPS on the phone).
But, like you said. You already have most of the "killer apps" that this phone presents, so FOR YOU its prolly not a wise financial decision. Doesn't mean that it in itself is overpriced. I think that can only be when the sum of the "parts" is significantly cheaper than the product.