ok, i am here to clear a few things up. for my background, i am a veteran mac user of many many years, and i have used pc's many more years than a mac. my personal prefrence is mac.
as far as switching, having to lose all of your personal files and such. 90% of your personal files will transfer over, even if you dont buy microsoft office you can open office and excel files in appleworks. as far as accessing certain websites, usually (on the mac) it has to do with your browser, i checked alot of those sites listed try downloading firefox from mozilla it will open most of those sites (all that I tried) if you are considering a mac, it is easier than it has ever been to switch, very user friendly file structure is the same you just have to get used to the viewing (you can change it to make it look like a pc, just no start menu, but you get the dock which i personally love). you may pay a bit more, but the up time is worth it, my powerbook i currently use i have had for 3 years, it has crashed once, and i use it hard with alot of media processing.