13" pro grip case and key protector

Hi, im very new to mac and I bought a 13" mac book pro. Im wanting to get a protective case that has a slightly grippy feel because the macbooks metal is slippery.

Also my friend has a keyboard protector but she has the 15" where the speakers are on the side.... the 13" speakers are under the keys so is there a key protector that doesn't muffle the sound?

The cheaper the better

thanks