ive been using soundstream components for a few years now, continuously testing and noting
the lil wonder 4.480 is really in a world by itself, clean output, underrated by quite a bit, and yet friendly to your pocket
the xs series of subs are really nice subs for entry level music ppl, its cheap, bout $425 - 500 bux, the sub's frequency response is really nice, u actually get variation of frequecies with it, as a competing sub with pioneer, the soundstream xs series gives u more bass frequencies and sounds cleaner too. whereas pioneer is loud, but only a limited frequency u get from it.
there are further reviews i read once on steveselectronics.biz . check them out if u like.