Spyware, Malware, Firewall, Antivirus package for mac?

I have bought a macbook pro, do I need to install a security pack for Antivirus, spyware, firewall etc on my Mac book. I have leapord 10.5.5 installed in it.
Which software is the best for it. From where I can download it or buy it…Please help me regarding this….

This is what you are looking for

http://www.symantec.com/norton/macintosh/internet-security

claims to not support 10.5.5 but good chance it will support will tell you or use this

http://www.symantec.com/norton/macintosh/antivirus

Norton AV includes all except firewall

and use this for firewall

http://www.symantec.com/norton/macintosh/confidential

Norton Confidental

Norton internet security Mac OS X

The Best Available

Astrum Antivirus Pro Info & Removal Guide

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