Hi, I'm very sorry for the delay...Apologies.
Thats all I need. Thanks. Your Mac can handle the latest Mac OS X 10.8 Mountain Lion
To install 10.8 Mountain Lion, you need to have the Mac OS X 10.6 Snow Leopard installed on your Mac. So first, buy the Mac OS X 10.6 Snow Leopard Retail Discs and upgrade your Mac to 10.6 Snow Leopard. Upgrading is easy, just put the discs to your Mac and follow the onscreen instructions to upgrade.
You can buy the Mac OS X 10.6 Snow Leopard Retail
discs from eBay.com, Amazon.com etc
After installing Snow Leopard, you can buy 10.8 Mountain Lion from Snow Leopard's AppStore as digital download.
You got a pretty powerful Mac, so you don't need to do any hardware upgrades.
Let me know if you have any questions. Don't Rate my answer until you are satisfied.