I have loaded up the ipod (Brahms 1st Symphony, A Hard Day's Night, Amarantine, Russ Conway, Max Bygraves, Oasis, Spice Girls etc) and my favourite has to be Long Long Journey by Enya. It's not one to stride purposefully to, it's more of a calorie-attracting langour. I can't stand it when she starts going off in Welsh, but apart from that she really pushes my buttons.
The Brahms is von Karajan with the Berlin Philharmonic, if you've never heard it, do yourself a favour now. The finale of the 4th movement will stir your heart. Or maybe not, but I tried.