sound damping materials

Your thoughts on this material (see link) sonex
pyramid vs. generic egg crate foam.

Sonex pyramid
http://www.markertek.com/MTStore/product.CFM?BaseItem=PYR-2

standard foam
http://www.foamorder.com/products.cgi?cart=i3X0q0n822M622M53M66n4B1b0Y&item=acoustic


configuration;
* Lambda TD15 woofer
* 5ft^3 rear ported box tuned to 35hz
* 1.5" thick MDF cabinet all around.
* crossover - low pass 800hz - hehe
* 500w feeding the woofer.

Should I increasing cabinet thickness
to 2.25" instead ? hehe

I'm the uber-overkill type of person
so feel free to post esoteric sound
damping ideas - lol



Follow Ups: