On a riocar, You can select any one track from any feasible sized library with less than 5 button presses after entering 'search by title' mode on a riocar //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif...most of the time less than 3. It's like dialing a phone...the dial-a-track. You can then choose to insert, append, enqueue or replace in current playlist that track. Same interface goes for genre, artist, album, or year. All tracks are given unique PIN #'s so you can pull them up with those if you have favorites memorized too. You can mark tracks on the road with a single button then get a playlist of all marked tracks displayed on your pc when you return home... it even has a self calibrating mode for it's PEQ a-la eclipse's microphone calibration routines. Weeee.