I have about $70 in Best Buy gift cards and am looking to spend around $100 total for a decent set of speakers that have an auxiliary input to couple with my Airport Express for Airplay. Any recommendations? Not looking for monstrous or booming sound, mostly for use while working or cleaning up around the room. Also, the more portable, the better. Not looking for something that requires more than a plug and cord to connect to the AE. Thanks!