hahahahah, i literally wana laugh here lafafa g 
1) u comment on gt-5s though u never heard em in a box for highs or sealed . wat u have heard em in is a 2.5cuft net box way bigger for their needs and was gud for a 3012 only. and its low tuned.
2) cvs also didnt pop my ears (H), they were clear though. but that would be a shame considering their cost if they hadnt been.
3) jbl gto sub is altogether a different sub, and u havent heard it janab, its sq is better than cv for sure, though power handling is less.
and yes it plays trance techno rnb whatever.
4) 3012s are not a fail below 40hz. imo, they shine below 40hz, where as 308s outclass them in high notes.
A review should be based on overall testing, atleast i expected this from sir stj, 99% people in this world listen to ported boxes atleast in pakistan, and in that 3012 performs wonderful. very clear lows.
Kher its up to madhouse, bcoz i believe spending money like water alone cant get u quality. some times its arnd u in cheap , but u are just to classy to look at it hahaha