Man you've been unlucky. I can't believe how some seem to get faulty hardware over and over. Personally I have never received one single bad product from apple... Despite the fact I've bought a lot and I've been very aware of any defects.
I had never had so much bother before until now. This is my 6th Mac since Xmas. 4 Airs and 2 iMacs. My current iMac has dust under the screen which is distracting, the magic mouse is also distracting because the aluminium stucks out underneath, both the imac and keyboard came with scratches/marks an dents. Doesn't feel new.
I have tried over the last week to just ignore it but I'm just not enjoying using it at all. It's been such a hassle and it will be a further hassle taking it to the store. Either they won't do anything or they will give me a replacement which will, knowing my luck, have problems of it's own.
I really love Apple's products and it's the only reason I've stuck with them the last 2 months. I just want a product that has no issues and is a pleasure to use.