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Hey. Take this from someone super anal with my 3gs. 10 cases to date. Best I've found for protection is otterbox defender. Hands down. Little bulky though. Currently running invisible shield on back with iskin revo2 case. Also a crystal film anti glare. This combo rocks. Good protection on ur phone and not a single scratch. I finally found my ideal setup. I will run this on all my iPhones. Hope this helps.
 
So far The Agent 18 Ecoshield is my favorite. The incase slider used to be my top choice I had about 4 different incase sliders all different colors. They are a little slippery fo me due to the gloss unless you go for the matte finish black. The agent 18 had silicone bumpers and has silicone protection the volume rocker and sleep button unlike the incase slider. The incase slider looks very clean though. All up to what you really like. Here are links to both cases on case you wanted some more info

http://www.agent18.com/productdetail/iphones/ecoshield-slider-for-iphone/136.aspx

http://www.goincase.com/iphone/slidercase/
 
Speck will replace your case free.

Yep, my favorite so far. My first one CandyShell (White/Grey) did crack on the thin bottom section about the connector port, but it is still usable. I now reverse the install/removal directions to avoid torquing the bottom. (Pull the top off first).

If yours cracks on the bottom like that, Speck will replace it free.

This is what they emailed me when I complained about my BatWing Black case cracking on the bottom near the dock:

Please mail the case to us for a replacement. There is no need to send the packaging back. On a 3 x 5 card include a return address and the top two colors you want just in case the first choice is out of stock. Please feel free to pick a different style case if the one you currently have just isn’t working for your needs. Include your email address so you can be copied on the replacement order email which will have your SO# or Sales Order number. Please keep that for reference. Allow 3-5 days for delivery once Speck receives your case.

Mail to:

Speck Products/Warranty Replacements
227 Forest Ave.
Palo Alto, CA,
94301

Customers are responsible for shipping to us. We will pay the FedEx shipping costs for the replacement back to you. We suggest you mail the item via a traceable method. Speck will not be responsible for lost or missing packages.
 
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