I currently have a 2008 Airport Extreme. I'd like to better extend the network within my house. Should I: 1) Buy an Airport Express for $99 and use it as a repeater along with my current 2008 model. 2) Buy a new Airport Extreme for $199 and use the existing 2008 model as a repeater. Outside of saving $$$, is the new Airport Extreme worth it for a home with two iPhone 5's, iPad 2, 2008 iMac, and a PC. Thanks.