I was a long-time mac-user (not as long as many here, I suppose), from the Powerbook Titanium through Intel macs. After the iPhone came out I abandoned Apple. They were making boatloads of cash on iPhones and started ignoring OS X, and now it's really starting to show obviously with Lion. Apple makes great, beautiful, usable, expensive hardware. I even think they make great software, but it's not as great as it used to be. Windows 7 OTOH is actually passing tolerable, this from a long-time Windows hater. I'm not going to recommend you go to Linux necessarily, although it sounds like you already have some familiarity. But why go through all the trouble of switching if Windows works but feels kind of 'meh'? Mac OS X won't bring some sort of magic to your computing life. It may just bring a bunch of expense and hassle as you migrate OSes.