JL is GREAT stuff. Very solid/robust. I've used them for years. I am not a fan of their larger heavier woofers though - not musical, but their lighter stuff is great (favorite was a 12v4)!
Stealthboxes are known to be the best, not sure about the BMW version though. I had one in the past and it was great.
PS that setup should HAMMER. That a big amp. Why not a 500/1?