Default [Q] Uninstall Cyanogen Mod 10.2 [Noob]

hello, I installed CM 10.2 on my i9300 and I'd like to uninstall it and revert to stock rom bc I don't like it.
I don't know what firmware to download, my base firmware is I9300XXELKC and I downloaded it from http://forum.xda-developers.com/show....php?t=2030384 but I'm not sure.