About my decision: I am getting the 15" version. I do care about the possibility of suffering from a whining noise, but I'll just go through several tech support phone calls if any of that happens.
I wish I could say here that I ordered the thing already, but I don't. Well, I do, but not entirely. My payment bounced because I hit a limit on my credit card. Need to fix that first, so the order will complete probably somewhere this week. I hope.
Becoming a Mac user means that I will start reading more Mac related web sites and blogs, and subscribing to some feeds. Milo already suggested a nice one: Macupdate.com. What else do I really need to start visiting regularly?