the pa is a solid amp, done a few installs with it and they turned out well, don't have any experience with the soundstream yet, the pa is a **** good bang for ya buck though imo.
well my biased opinion says 3000db but I have never owned or heard a soundstream amp or seen one at a show burb but all i can say is my 3000db has been heavily abused and it doesnt heat up at 1ohm and I cant wait to get a 3rd sub to run it at .66.