JL is coming out with a TW3 line projected for April or May. 15mm 1-way linear, 12" only 3.5" deep, wanting .75 cubic feet. 75-400 rated rms. Also, the JL W1v2's and the soon-released W1v3's are very shallow with no pole vent. Obviously the SI BM MKIII, too, but hard to find and higher pricing.