I've decided to make the switch, and order the new imac 27". I do have a few questions though. I remember when I upgraded my windows to another version of windows. From that point on I had experienced a lot of crashes. When the new Mac OS X Lion comes out, and I upgrade to lion will the same thing happen? Is it gonna have any negative effect on the computer itself? Also when I do upgrade to lion will I lose all my files, and programs that I may have purchased? Will Mac OS X Lion be expensive? While I'm resigned to the fact that Im going with mac, Im just trying to figure out If I should wait until they come with lion. Also, just one more thing. I have my files that I want to move over from pc to mac stored on an external hard drive thats ntfs. Is that gonna be a problem? I dont want to plug it into the mac, and find out I have to reformat it, and lose everything thats on it. I have a lot of HD videos, so they tend to be on the large size. Will I be able to move the files from the external drive to the mac internal hard drive, and have the mac be able to read/write? I apology if these questions are dumb, or been asked a million times.