Need Help with URL Structure Choice on BigCommerce :(

I have recently changed over to big commerce from interspire and it gives me the option of URL structure. I do not need to worry about redirects from the old store as it crashed and burned so this is a fresh start.

Here are the three choices i have:

Product URL Structure:
1.domain.com/ipod-nano/
2.domain.com/products/ipod-nano.html
3.domain.com/mp3-players/ipod-nano/

Category URL Structure:
1.domain.com/ipod-nano/
2.domain.com/categories/ipod-nano.html

Pages URL Structure:
1.domain.com/about-us/
2.domain.com/pages/about-us.html


Is there any benefits over one type to another? What would you choose for each URL structure?
All help appreciated

Go with #1 for all choices. You want to keep your URL structure as flat as possible. Higher level urls are deemed more important and rank easier.

I had a site a few years ago that had the following:

1. example.com/category/ (had a link to the product in #2)
2. example.com/category/product

#2 had all the information about the product and #1 just had a link to the product. Googling the product name revealed that url #1 ranked higher than url #2.

Yeah i was thinking along the lines of the shorter URL. But have no real experience in testing one over the other. Thanks for your input.