I have the Chicago Metallic commercial 9 x 9 pan and love it.

Here is a link that might be useful: Chicago Metallic 9 x 9 pan

Bought one at Williams-Sonoma before Thanksgiving. I had to do it, because I couldn't find one anywhere else and needed it right away. It was the last one they had at that store that week.

I usually use pyrex not metal. Is the Williams Sonoma one metal?
I always read that glass is better for baking. Not true? Only true for some things?

The one I got was metal.

marys1000, I switched to metal baking pans (not nonstick) after reading some horror stories about Pyrex exploding. I didn't dump my Pyrex, and I still use them occasionally, but I really like the metal pans.

IIRC, many recipes suggest adjusting the baking temperature if using glass, something I don't have to worry about with the metal.

I spray my pans with that cooking spray that's specifically for baking (I think it's an oil/flour combo?), and I've never had a problem with sticking. I use the same brand of cookie sheets, with parchment paper or spray.