[CentOS] ssl certificate, maximum protection, on the budget?

Hello,
	I've got a client who wants to go ssl. He's running a web server,
smtp/pop, and ftps and imaps is coming as well. I'm looking for a wildcard
ssl certificate i believe it's called but one on the budget plan. I am also
wanting to ensure that the mod_ssl with httpd on the server is only using
the strongest encryption methods and protocols.
Thanks.
Dave.