What's the best see-through case for the iPod mini?

[dferigmu]

I'm about to buy my first iPod ever, a 6GB mini, and I think I want a case to protect it. I would want a case that doesn't make the mini much bigger, something that's pretty much see-through and doesn't get dirty quickly.

These are the ones I am mainly interested in:

Agent 18 MiniShield
Agent 18 mini Shock
Contour iSee-mini
Speck Mini FlipStandor
Power Support Crystal Jacket mini

Does anyone have experience with any of these?

 

[The D Man]

The contour one gets my vote

 

[dferigmu]

The contour one gets my vote

Two questions: How tight is it on the mini and is it hard to take off?