I'm just curious how many of you use desktop/external speakers with your rMBP. I'm not an audiophile by any means, but I can certainly tell the difference between horrible audio and good audio. The rMBP speakers are amazing. Even the Air ones were good to me, but the ones in the rMBP are more impressive and fuller sounding. I'm sure there are people who still do use desktop speakers, but I think the quality of the built-in ones are starting to make that unnecessary.