Fu mans have a horrible tendency of dying within a week though. Some people get lucky (lucky with how the fish shipped) They'll look perfect inthe LFS, but die when they get home. A friend of mine wanted one, and thought that since mine was doing so well, he'd get one too. He got two of them, both of them died within two days. So he got a Volitans lol
I'd be really careful, and make sure your LFS has a good return policy before trying a lion and an aggressive hawkfish. Lions are only called aggressive because they'll eat shrimp, I've never seen one fight an attacker, they usually run. Hawkfish are a lot faster than lions. Since they're both bottom-dwellers, make sure you watch them and can return the lion if the hawk goes after him. They're vicious little buggers when they want to be.