of those listed, JL.
personally, I really like alpine. (Type S for non amplified or type R for amplified)
for the record, all of those are not even in the same ball park as each other,
most of pioneer's speakers use thin plastic for their cones and tweeters = kinda harsh sound, especially as higher volume, very "peaky"
infinity uses much nicer materials for their drivers which give a much softer and smoother sound, very warm and rich sounding
JL tends to be very sharp, and clear, real precise.
alpine seems to fall somewhere in between the infinity and JL. still very clear and precise but still with a little bit of warmth.