Moved into a house recently (used to be in an apartment) and my Airport Extreme isnt performing as well anymore. I have my office upstairs and i guess the signal is having a hard time traveling but i'm only getting about 5 to 6mbps download speeds. if i carry my iMac downstairs I get 25mbps + any advice? is it my airport extreme? is there a newer better router that has better range? any advice is much appreciated. bought my airport extreme a little over 2 years ago.