I have a 2012 Airport Extreme to provide the household's computers, iPads and phones. My iMac is located in the other end of the appartment, and it gets a download speed of about 45 Mb/s (located in the kitchen, where the AE is located, it gets 95-98 Mb/s). (We have a 100/10 Mb connection.) I'm thinking of getting the new ac capable AE, and use my old one as a signal strengthener half way to the iMac room. Assuming I'll buy some ac capable device (ie a new MBA), what effect will this have on the ac performance?