Griff,
Before my fiancee was given a 1GB Shuffle by someone, we were seriously looking at the iRiver because of its external microphone jack and expandability. It also can use Windows Media Player, which isn't bad given the competition

.
I would stay far away from any device requiring either MusicMatch Jukebox, Creative Labs, or Sony software to load the mp3s onto the device. I've found those three to be the most horrible out there. I remember when Apple had to bundle MusicMatch with iTunes. I bought XPlay, and so did 3 people I know, due to how bad MusicMatch is. Dell uses MusicMatch, from what I remember. Sony, for all the good walkmans I owned, has put out garbage for software.
Pretty much anything else seems like a pale imitation, especially anything Creative Labs sells.
Mitch