MP3 players: Zune 8GB or iPod Nano

Zune 8GB or iPod Nano

So it's the great debate: Zune or iPod?
I've had a Creative Zen MicroPhoto for a few years now, and I love it. But it's broken again and it seems to be time for a new player.
I'm just going to be using this for simple listening and as an alarm clock, which I'm hoping it's available on both the Zune and iPod.
What I really love about the Zen is that it fits easily in my hand, it's "grippable" per say - there's something there to hold on to, and that's what's worrying me about the iPod.
I'm just using this to listen to music while crafting really, and I'm a little clumsy, I'm hoping whichever one I get will stand up to being dropped once or twice before going kaput.
I'm loving the Zune's interface and the controls, but there's a lot of negative opinions about the Zune, same with the iPod.
I'm technical enough to figure out either or. Many people say that the Zen MicroPhoto is difficult to control, but it was easy enough for me to figure out.

I'm open to both sides.