re: Car audio question

For a head unit? I think they're pretty much all the same now, but try to match it to the speakers. Pioneer is usually the one I recommend because it works and is relatively easy to figure out. I have a highs amp that pushes 125x4 @ 4ohms because I have higher quality speakers, but IIRC the Pioneer radios do 50w which should match those speakers well. The reference series is made for un-amplified systems