Good "Sounding" Amp
 

I want a really good sounding amp for my car. Either a 4 channel 50w-100w per channel or 5 channel for the woofer.

A "good sounding" amp will allow your music to pass through with no coloration or changes, not imparting it's own "sound".
Most better quality brand name amps do this. If you're really after clarity, look to names like Audison but be prepared to pay for it.

for me the new alpine pdx-f4

I just had the alpine PDX F6 hooked up and I love it its 150 W per channel though. The F4 might be better if your looking for 100W per channel... But I thinks these alpines are probably the best on the market right now.

Yup, I just finished install of a Pdx-5 and it's the best amp I've ever owned

Arc Audio 4100SE, ARC SE series amps are just overwhelmingly dominating the SQ scene

It's just because it's the current "in" thing. Every year there is a new overwhelming champ because it's new and what everyone uses. Sometimes it's JBL, sometimes it's whatever.

:p

There was still JBL, JL Audio, Mosconi, Zapco and Alpine amps being used at Finals. Guess who dominated?

I will guess that it is the same people that dominate every year regardless of the amp they choose to use.

Biggs and Eldrige been taking a few 2nd place trophies behind far less know people using ARC