I bought an early 2011 (the current model at the time of writing) 15 inch, 2.2GHz MacBook Pro.
I had a previous generation model, pre unibody model which I loved and performed like a star.
Performance wise I am loving the machine but the hard drive makes such a noise under normal operation it's untrue. It sounds like a fan, but I assume there is no cooling where the HD is, but it bellows. It's not the fans - they are happy sitting there at 2,000 RPM. It can be reduced to what I would consider normal levels but putting my right hand directly above it. Very gentle pressure is enough to stop this happening. I am not sure if it is pressure or touch (e.g. grounded) related.
There are a bunch of people on the Apple discussion forums with the same issue, but nothing from Apple, not help from the geniuses/applecare and no obvious "fix". I just dropped a big chunk of change on the machine - I don't want to have to open it up or replace the drive just to make it bearable.