My near decade old PC running Windows XP Pro SP3 still runs well but it was time to upgrade my main home desktop system. My options were buying a new desktop or laptop running Windows 7 or building my own PC with the best parts I can purchase which is what I have always done in the past. When I was at BB looking at the computers I noticed the Mac Mini was on sale. I realized it was about the same cost as if I built my own PC desktop box with Windows 7. I always wanted to try a Mac in the past but they always seemed expensive compared to the PC's with Windows. The Mac Mini base model desktop unit with Intel i5 2.3Ghz was on sale at BB for less than the Windows PCs (about $570) I was looking at and except for the external DVD/CD writer ($80) everything was already put together in one small ready to go desktop package with every major feature I wanted (minus USB 3.0. It only has USB 2.0 ports. You also must purchase separately or use your own mouse/trackpad, keyboard and monitor or TV with HDMI input). I upgraded the RAM myself from the stock 2GB to 8GB for $45 by ordering direct from Crucial. I ordered Parallels virtualization software for Mac so I can run Windows XP, Windows 7 and Linux concurrently virtualized inside Mac OSX Lion. I was going to use my own keyboard and mouse but after some initial resistance I ended up buying the Mac wireless keyboard and wireless trackpad that were designed to work with OSX Lion. Surprisingly I have adapted very quickly to the Mac keyboard and trackpad and now they are two of my favorite things about using this new Mac. I type better than I ever did before on a regular keyboard and the Mac trackpad with OSX Lion's built in multi finger gesture control seems more intuitive and easier to use than a traditional mouse or trackball. After working with Mac OSX Lion for the last two days so far I am very impressed. This system with the upgraded 8GB DDR3 memory feels really quick. Programs start in the blink of an eye. After an initial slight learning curve with some frustrations I am already adjusting to the OSX environment very quickly. OSX is built on Unix and while the GUI layer is OSX Lion it does seem to have a nice secure Unix feel and function with it's default security settings. I have been running Windows XP SP3 so I can't compare to Windows 7. The entire OSX system seems to be comfortably locked down without being annoying to the user. By default it requires your personal password to make system changes or to install programs. I installed Firefox 11 but I am already using Safari as my primary browser now that I have become familiar with it. One of the intriguing aspects of OSX always was the enhanced security but I didn't want to sacrifice all the functionality I had for browsing popular web sites. Therefore I didn't install Java but I did install Adobe Flash and customized it's settings with restricted permissions for extra protection. My next quest is to find a good AV program for the Mac that also protects against Windows viruses. The Mac OSX has been vulnerable to viruses in the past and it benefits from having an AV but I also don't want to unknowingly pass on malware to my Windows machines. I am running and testing out F-Secure for Mac on it right now but it only protects against Mac viruses. There are a few top rated Mac AV programs I want to try out including Bit Defender and ESET for Mac. I am open to other AV suggestions from other OSX Lion users in the forum.