good vibrating egg/bullet?

I've seen vibrating eggs and bullets in many contexts. They seem pretty fun, but I've never had one or spoken to someone that has, so I'm having a lot of trouble picking one. The majority of them I see seem pretty female-centric, so are there any good ones out there for guys (anal use)? Or does it not matter as much? (Also if anyone's seen those kinds that come with a leg strap, that'd be really cool too.)