Hi I'm planning on replacing my faithful Dell laptop, and for the first time in my life I'm considering a Mac. Basically I have questions about 2 topics. First Topic - Mac OSX: I'd like to know some opinions on the transition from XP to OSX (specially what it is like not to have a 2-button mouse). I don't care much about software compability, thanks to bootcamp and/or virtualbox. Also I'd like to know about the reality about mac security. I know, it's UNIX based, so it's pretty secure, but isn't the increasing market share affecting security? Are there any good security products? If they are, are they really needed? I run both XP and Linux, and had never a problem with Linux. Second Topic - Win XP: I should be able to get a XP OEM if I buy a computer before June, 30th. But every online store I visit only offers Vista computers. Is there a good, trustworthy, cheap online store where I can find this? Maybe if I buy over the phone it's easier. I prefer the following brands: Dell, Asus, Toshiba or Lenovo. My budget goes up to $1,500, and the minimum specs I'm looking for are: Intel C2D 2 GHz (if possible more) 2GB RAM, expandable to 4 160 GB HDD I don't care about graphics card, since I don't game that much. Thanks!