I am having random slowdowns on my connection speed using Airport (nothing to do with the notorious performance issues which I also suffer). So I dug a little deeper and checked my linksys router signal strength for each client on my network and the result could not be more disappointing for the iMac. My appleTV and my HP 2140 get 90% (it's right by the router) and 80% (floating around the same floor of the house) signal strength respectively, download speed and throughput seems very stable on both, however on the iMac (that's about 10 feet away from the router) the signal strength is 28% !!! this is incredibly low and even though it does not always hurt download speed it does hurt the total throughput when sharing files over the network. Also the SNR (signal to noise ratio) is incredibly low, below 30 all the time. If my other devices were in the same ballpark I wouldn't worry, but this is a huge difference, I wonder if the aluminum case back hurts this much wifi signals.. I knew iMac weren't stellar competitors in the wifi race but this is another hit and this is the second issue I run into in less than 2 weeks with it. Does anybody else have this issue? also can someone check their "real" signal quality of their new iMacs 27".