winsecure

I'm looking for a MP3 player to use for workouts. Thought I'd see if anyone had recommendations for either getting or staying away from specific devices.

My criteria:
At least 128 MB storage (or ability to add additional storage)
small/lightweight
ability to wear via an arm-band

I almost posted this in electronics, but because of my intended use, I thought I might get more specific responses here.

thanks in advance