unfortunately you asked a question to which you'll receive a different answer in every post. At the end of it all, you'll be back to where you are now...having to decide for yourself again. Everyone has a favourite on here, and they'll all give you those suggestions. Honestly, any one of those brands/models are more than capable of delivering good quality, loud, clean bass. All are well regarded in the build quality department. It's really going to hinge on what fits your application...size of box, power available, cost, cosmetics, and ultimately personal preference. Of the ones mentioned, I've listened to the MTX, Alpine, and Kicker most...I liked the Alpine for SQ, the MTX for loud and clean, and the kicker was very good, but my least favourite.

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2004 300M SPECIAL
Alpine CDA 9833
Alpine Pxa-h701
Alpine Rux-c701
Rockford fosgate p400-4
Rockford fosgate p4004
Hifonics BX 1205D
JBL c608 GTi
JBL p693
Infinity 2.5" center channel
Alpine type R 12"(2)
all active SQL set up with 1900 watts rms