My 2011 13in mbp keeps disconnecting after about 20-30 from my router. The router is Linksys WRT120N. I had a mbp late 2009 15in and it does the same thing. I made a thread about it a year ago... I tried changing settings on my router....tried everything but it keeps doing this.. Should i buy airport extreme? does anyone have any problems with it? Also, i don't know how often it is updated so is it a good idea to buy now? Thanks.