Well the ones you've mentioned arnt really on the "decent" list. I can't tell you about the soundstream honestly, but audiopipes are really hit and miss on the forums, people either love theirs, or I see some really horrible horror stories about them. It's kind of a gamble I think. But other amps for a good price, if I were you I'd look into a crescendo bc2000, the AQ 1200 or sundown1200 or 1500. You pay more but you only have to buy them once!