stupidly, my modem is setup at one end of my house. the router im currently using is a linksys e2000 but it doesnt give me the range im looking for. ive decided on buying an airport extreme to go along with my new rMBP. im debating between either buying the 5th gen airport extreme or the newer 6th gen extreme. are there any significant differences in range and performance? i will also be getting an airport express as well to extend my network and to cover any deadzones.