hey guys, i've been lurking on the site for a while now, lots of great info... been trying to get stuff together for new build and talk ol lady into lettin me waste money on car audio again ... only messed with sketch up a few times but these are kinda the two ideas i've got in mind, neither box i've really calculated airspace yet but i'm going for 3-15" subs, 12 cuft and 150sq/in port, tuned low (30ish), just looking for any input of which might sound better or if anyone has got a different/better design