I think I heard Apple claimed that the speakers on the new rMBP were the "best ever put on a laptop." Anyone with direct experience care to chime in? (A link to a review that goes into detail about the speakers would also be nice.) I don't expect them to be anywhere near as good as external speakers of course, but are they on par with say, the speakers on an iMac or LED Cinema? What about compared to a USB sound-bar like the Logitech z305? Is there a significant noticeable difference when comparing them to the speakers on the current Macbook Pro? I'd like to try it out in an Apple store, but I'm afraid the crowds and noise won't give me an acceptable listening environment. Thanks!