Agreed.
Seriously mate you should have at least given Apple a second chance - what did you have to lose? If the second turned out to have problems as well then fair enough at least you tried.
Every company, no matter how good they are, will inevitably end up making the odd defective product. Just cos you had problems with the last one doesn't mean the next one will do; you were just unlucky. There are many people out there, including myself, with perfectly working Macbook Pro's. You could still be one of us by trying again!
If you really are that paranoid about getting a defective product why don't you just go directly to an Apple store or authourised retailer, buy it, open it up there and then and if there's any problems they can replace it STRAIGHT away. Problem solved.
Come on, you said the whole Vista - Leopard issue drove you over to the Mac side. Yet as soon as you have a problem you seem perfectly content to go straight back to the Windows world. Aren't you even gonna put up a fight? Or maybe subconsciously you never wanted to "cross over" in the first place ...