this. I bought a set of 8's to replace the very expensive 8's in my kickpanels before I sold the car.. WOW, was I suprised what $30 bought me. Midrange wasn't as clear, but my midbass improved and output was the same or a bit better (granted the pyles were getting over 2x the power since they were 3ohm drivers). I had 300 watts a channel and they def didn't "like" it persay at full volume, but they took it pretty damned well, I was very impressed..
Odds are the tweeters are about the same or very close. If your looking at adding multiple set of tweets your not looking primarily for quality anyways, you want cheap and loud, get whatever is cheaper, I've heard the AQ tweets. Properly setup they don't sound bad and I've heard enough pyle pro to assume they are the same way.
