Just for reference sake, my buddy( I wont name him unless he wants to speak up), had 2 IA DP 15's, with 2 rd d9 @ .7 or .35 ea-cant remember which-, 3 xs power batts, 300 amp alty, ford escape, dual 0 guage runs , no wall , and wasnt able to break 150. I believe his best was a 148.9 dbdrag style- 30 sec avg with "music"in other words it was a song with just 1 long bass note in it ( 42hz I believe). That was a daily system, tuned to 38-42 hz somewhere in there. Point is, with twice the cone area, and 3x the power, he couldnt do it on a daily system, I dont expect you will. Maybe a burp tuned high, but with your setup if you can do a 146 dbdrag style, then you would be doing good I think.
Edit: he was able to break 150 on a burp I think, but that doesnt really count, I mean who listens to burps on their system anyway right?