Sub enclosures

Anyone seen the april car audio and electronics mag>? well if you have there's a BMW in there with some crazy mods. If you look at the sub enclosure it basically looks like a slanted peice of wood holding the subs and plexiglass on either side with ports in the trunk. Do any of you think that this would be a good idea if i were to put either 2 12'' W7's or 2 12'' MA audio synergys?

Thanks