dynomat vs' dynoplate????

i was looking through crutchfield and saw three types of dynomat. i knew of the original and the extreme. but then i saw the dynoplate. when i read about it all i could make out was that it was at least as good as the original dynomat, but what about compared to the extreme??? also i saw a hood liner or whatever its called, will that help a good bit, or just a little for interior stereo sound quality?? also on ebay i see all the other sound dampening stuff like brown bread or something like that. how is all this compared to dynomat. thanks.