Once you're familiar with the Ken & Andy / SSD dynamic, there's nothing funnier than all the Trainwreck episodes. I'd say they're not for SSD beginners, but once you're in that universe, they're amazing. Just go to the archive and search for "trainwreck". There's a whole bunch of them.
Also, one of my favorites is the one where Ken and Andy goes through the radio dial and reads back what is being said on other radio stations... kind of difficult to explain but it's amazing. Think it's this one:
February 6, 2008: Ken and Andy Channel the Radio Dial