This seems to take the cake as far as 8" subs go IMHO, but unfortunately it IS a car sub. Don't know how it would sound (other than loud) at home. Most of the serious home stuff is larger dia.. Certainly looks durable though . Looks capable of launching a mortar round.
It depends on what you actually want to use it for. If it is for sub purposes only the JL audio will win, I assume. If there is some midrange reproduction expected as well then the Flexunit will be better. I use one of the latter (with custom parameters) in my Manger boxes.
Well yes some midrange reproduction would be expected. I doubt that i'll actually be able to do this any time soon (due to the cost) but the only reason i was asking about a robust 8" is because i think it would be cool to use a very small sealed enclosure (made of thick steel maybe) and EQ the bass (ELF or BASSIS type) and use the ATC mid with some sort of ribbon on top. It could be used as a really small yet abnormally powerful near field monitor. Especially if actively amplified with say a few hundred solid state watts on the bass, OTL on the mid and highs (single ended for the ribbon) it would also sound abnormally refined.