I'm a Windows pro. I've been with Windows operating systems since Windows 3.0 hit the market and know them all inside and out. I made the switch to Mac about a month ago. What is so beautiful about the Mac OS is that it just works. I thought that was just a slogan, and then I started using it, and my God it does everything I want and more. I have OS X 10.5, which is called "Leopard". Leopard has so many utilities and applications already onboard, you're ready to go right out the gate.
If you're like me and are a freeware hound, Mac freeware is plentiful and very high quality. Macs are very secure, and I don't use an antivirus or cleanup program on my system, as it takes care of everything without my intervention. When I got Windows Vista about a year and a half ago, it was fast...for a week, and then it was bogged down. OS X has been consistently fast and efficient since I first powered it up.
Here's my system if you're interested.
It's an iMac Intel Core Duo 1.83 Ghz.
It has a DVD superdrive (burns to DVDs & CDs), 2 GB of RAM, 160 GB hard drive (and I have a 500GB external), a built in microphone and iSight camera, and it's just one powerful machine. It handles DVD authoring, CD burning, movie creation, all sorts of great apps, and I wouldn't trade it for a brand new Vista machine if you begged me.
I mean, this system runs everything so efficiently! Just for fun and to prove to my friend what an iMac can do, I started up my iTunes program, playing some Van Halen, and turned on the visualizer. I started up iMovie, iDVD, Firefox, my Virtualbox (with Windows XP), World of Warcraft, Open Office, my video converter, Photo Booth, and Azure (a P2P program). I started processing a video file, converted a gif file in Pixelmator, downloaded a test file on Azure, made a spreadsheet in Open Office, downloaded updates in Virtualbox Windows XP, copied a data DVD, recorded me and my friend looking at the Mac in Photo Booth, and burned it to another disc.
All at the same time.
I was told by my Windows friends that a dual core 1.83Ghz Intel CPU and 2 GB of RAM wouldn't be able to do all of that effectively without system lag. Not only did my system not lag, but as icing on the cake, in the midst of all of this going on, I switched back to my visualizer and put it on full screen, which didn't miss a beat or skip once the whole time. I had a Vista machine with an AMD X2 6400+ processor, 3GB RAM, the whole works, and if you loaded Open Office, Firefox, Nero DVD burning suite (and burned a DVD) and Windows Media Player, the system started to really lag.
I won't be switching back anytime soon.
J.