A New Mac – PC Ad

I love those Mac vs. PC ads. The latest one shows an unlit sign that says “Don’t Give Up on Vista”. When PC pushes a button, only the “Give Up” portion turns on. He pushes it again and the “Give Up on Vista” portion lights. Ha. I saw this one on the Globe and Mail’s web site.

My newest computer has Vista. What do I think?

How do I downgrade to XP?

(would it even be possible for me to switch to Mac? I have too much software I am used to. Does Mac have decent alternatives in the free utilities section of Download.com?)