All

I'm going to be (finally ) upgrading my front speakers soon (CS605's), but want to do the sound deadening at the same time.

Looking online for good deals I found http://www.b-quiet.com - they offer Brown Bread at US$170 for 70 sq. feet - do I need this much to do the whole car? How heavy is brown bread?!

They also have their home-brand cheaper alternative (B-Quiet Extreme) at US$110 - has anyone tried this?

Any other alternatives I should be looking at? And is Brown Bread suitable for doing everywhere?

Thanks
Richard