cfcubed, thanks for posting your version of the sound box! I think your box is considerably less expensive than the alternatives, and possibly less bulky. I would guess that SoundGuy's box reduces the decibel rating somewhat more than yours does, but there is the issue of "diminishing returns:" if it costs twice as much to reduce the noise by another twenty per cent, is the expense worthwhile?
There is no answer to that question. It is like driving a Mercedes -- the car costs a lot more than an ordinary sedan and is somewhat better. Is it worth the money? To some folks it is, and not to others.
