If you can trade it in, why not? If not, just backup your stuff and if it fails, go get a slim.
All it comes down to really is the look of the PS3, and I prefer the glossy finish over the Matte, though, I heard that the Slim's run slightly faster... so that may persuade you, or if you are an eco-freak they use less electricity ;)
Unicorns ARE real - They are just fat, grey and called Rhinos








