I picked up the defender yesterday, and actually really like it. I generally get the commuter as well, but it has a great feel to it. It makes the buttons MUCH easier to use, which is a huge plus in my opinion. It also offers a very good screen protector that doesn't take away from the screen clarity like the protectors VZW sells.
We will have to see how long I can do with the rubber picking up lint (which it does, quite a bit actually)...but I have to say I like it better than all the other cases I've tried at my local Verizon store.