i'd say the 15" kicker cvr. it gets LOUD in a sealed box, i mean nose itchin loud and is pretty cheap too. i haven't heard it ported, but it would only be louder!!i had a 15 CVR and it hit pretty hard and nice in a sealed box, got it for 130 shipped off ebay and a hifonics BX605 hooked it up at 1 ohm 500 RMS sounded nice
thinking of that, maybe look into a treo ssi 8", i really want one to play with, but nothing to play with it in.SS Rl-i 8".