I agree. The extended battery does make a significant difference. I was able to make through a day on the standard battery, if I didn't really do a lot. Always had to keep an eye on the battery level and, once it got to about 50 percent, it seemed like it dropped like a rock. With the extended, I can easily go all day without even worrying about battery level.
I agree that the case situation is abysmal - black on black. I just got the TPU extended case in smoke and it is nicer and certainly more protective than the Vz shell/holster combo. My problem with cases is that the sound is muffled when I call people. I have had to enlarge the holes around the noise cancelling ports on the back of the phone. Takes a nice case and makes is marginally appealing, but better than no case at all... or the Vz shell.