URL optimization

[Tonearm]

Hello! I've got my store flexible enough now so I can format the URLs any way I'd like. Each product and category has a string in the database that represents it in the URL. Here's a product page:

www.store.com/blue_widget.html

Here's a category_page:

www.store.com/widgets-p1.html

The "-p1" is necessary to keep track of which page number should be displayed for category pages.

It seems like all of this will help by having keywords in the page name and a very short URL to dilute that keyword density as little as possible. This should be good for incoming link text too.

My question is about the page number definition. I can put that anywhere, and I'm not sure what the best configuration would be. Does anyone have any suggestions? Here are some possibilities:

www.store.com/widgets-p1.html
www.store.com/widgets/p1.html
www.store.com/p1/widgets.html
www.store.com/widgets-1.html
www.store.com/widgets/1.html
www.store.com/1/widgets.html

Thanks for any advice!

- Grant