As an extra note it's quite difficult to TOTALLY brick the phone,there are many ways to save it in case of disaster hehe
Well you can check safirmwares.com to download a copy of your current firmware,then reflash the phone using Odin and a compatible Odin rom img,but I prefer CWM for peace of mind. Odin can be fairly destructive if you don't do it right.
As an extra note it's quite difficult to TOTALLY brick the phone,there are many ways to save it in case of disaster hehe
You mean www.samfirmware.com