I've had the chance to try an iWatchz Timepiece watch band for my iPod nano, for several weeks now. I must say, I'm really impressed with the quality and value, considering the starting price for their various watch bands is under $25.
I shouldn't be surprised, as the company has a history of making quality watch accessories, as opposed to some of the accessory companies that have nothing to do with jewelry, and it shows with the iPod nano watch bands they produce.
I like that it has a stainless steel clasp that you can adjust and then leave alone. You don't have to find the right hole every time you put the watch on, this is a high end feature found in Rolex and other watches, like my Raymond Weil watch, which is now collecting dust in my nightstand.
If you can't find a band you like from iWatchz, you're just not trying! They have a huge selection, of leather, rubber, and metal choices in a variety of fashions.