I have polk speakers and they do very well with mid-bass and have low distortion.
This is going to sound bad but I have a jensen headunit and subs. The headunit is decent, it contrast with my car well and doesn't stand out. The HU has a 75 watt RMS rating and can't find my exact model at any store last time I checked. The subwoofers are awesome, I can't seem to find their limits. They are 400 RMS with a 250 RMS Rockford amp powering them. There are many reviews on the subs saying they are as good as compition, but I doubt that.
As my first setup, it is decent. I don't many friends that have upgraded there sound system to compare my system to, so can't really rate how well it is overall. Some may hate it but I like it and that is what matters.
My ride(Cardomain link) :
'95 Contour 16V Zetec DOHC,
Teal , ATX
Born on Sep. 4, 1995
86+ miles
*LEDs mods are on their way!*