I'm interested in providing additional protection for my iMac by installing an application that will detect various forms of Malware aimed at the Mac OS X system.
As far as I know, the only software that checks for that, and only that, is MacOS X itself. All of the anti-virus tools spend 99.9% of their time checking for Windows malware so you don't accidentally e-mail it to a poor, hapless Windows user.
Since Mac's are beginning to raise the interest of the hacker community
Nah. Theyve been trying to hack the Mac for decades. It is just that anything with the word "Apple" in the headline gets viewers and, consequently, advertisers. Contrary to what the anti-virus or Apple-basher crowds tell you, Mac's have never been, nor have their users ever claimed them to be, invulnerable. Macs are just practically invulnerable. The more 3rd party software you install, like Java, Adobe, especially any Peer-to-peer software, will increase the vulnerability.
I keep my system up to date with the latest updates/patches and I am very careful of the web-sites that I visit. But, one can never be too careful.
Are there any suggestions from the community?
You really don't need to do anything. Almost everyone impacted by the recent Flashback incident had never updated their systems.
You can run additional anti-virus software if you want. I'm sure people will chime in with their own favorites. Which would you rather do? Scan your system 24x7 for 99.9% Windows viruses for the next ten years? Or take a less-than-1% chance of getting some weak trojan in the next ten years? Even if you do get that trojan, an Apple software update will get rid of it within a few days. If past events are any guide, this should all happen circa 2026, of course.
You don't need any. If you do, use ClamXav - not anything else. But you really don't need any.