The aluminum or stainless steel ones won't have any flex if you hit something on them and will get dinged up but if it's for looks only then I'd rather have the one rhiannon posted up.
IMO the plastic is still better since it can absord an impact better.
'12 Focus Red Candy SE Sport 5 spd
'99 Toyota 4Runner Sport
'11 Subaru WRX STI Hatch