700wx Owner looking to upgrade to 800wx

[French700wx]

If this thread or something along the lines of it exists elsewhere feel free to remove it.

I have a 700wx, and I'm happy with it. But, today I started to look into the 800w, and it's very nice. I'm just getting mixed signals, and I'm wondering if anyone could put simply whether or not to make the move from my current phone to the 800w. I'm mainly concerned with battery life and if its buggy at all. I've heard that the battery life isn't very good, and even after looking through various other threads about it, I can't seem to figure out if it's really that bad or not. As for problems with it, I read something about a backlight issue, whats that? And are there any other problems with the phone?

tl;dr, switch from 700wx to 800w, wise or not?