I think females and males are different- I used to own mexican redknees- the males live like 5 years while the female lives to be around 30 years...
very fun pets to own for display I agree about the hairs being annoying.
I wouldn't handle them personally as no one knows if they're allergic to them unless they get bit. Like bee stings- no one knows they're allergic until they get stung- its possible someone can be allergic to those guys. So keep that in mind when handling any tarantulas.
ERIC: Was wondering how skittish are those bird-eaters? Do they really have to eat lizzards/anoles etc as an essential part of their diet? I'm not crazy about the part of feeding mice/lizards etc any kind of bugs I'm fine with but not with any animal with a spine.