I bought the Speck CandyShell and like it a lot. I did not use their screen protector, but grabbed a front only Invisible Shield to protect the screen.
I used to have a Griffin Wave and didn't like the bulk it added. The Speck seems smaller and completely wraps around the phone, unlike the Wave which was a two-piece that still let it dust which ended up scratching my 3G.
Love my Switcheasy Rebels. I also like my Incase Sliders, but if you want a lot of protection, get a Rebel. I have dropped my 3G a couple times on Cement, and my phone is fine. The Rebel took all the punishment.
I have had the rebel and the slider. The slider scratched my apple logo pretty good. My Bezel managed to survive, but the back was pretty damaged.
The rebel was a great case. But I hated how around the volume rocker the case tended to pull away. Meaning I had to take it out a lot and clean it. Very annoying.
Needless to say my candyshell is in the mail as we speak.
One more thing about the CandyShell. It does not have to be removed to use it in the dock. Just take out the dock insert and it fits fine. No need to take it off and risk scratching your phone.
built like a tank and you wont worry about protecting your phone
best case...my girl, who like to play "phone kickball", drops her phone often in the slider. yeah the slider is beat up and cracked on top (time for a new one ) BUT NO scratches on the back casing.
i recommend it highly
i just ordered the charcoal slider since i've never seen it