What are the best brand name sq subs other than Jl Audio?

i dont have much space in my trunk and the w7's are bit too deep to fit in my trunk..and w6s are not that powerfull..is there any same kind of sub in the market as w7s same sq bass and clarity but not that deep ?? i want atleast 750 rms or more in each sub..i m goin with either 2 12's or may be 2-3 10's in a custom sealed box