Holy F U C K my brain hurts after reading all the retarded opinions in this thread. I will bet my life that 99% of the people in this thread who say the Q is SQ and the HDC is SPL have NEVER owned/heard them both in proper enclosures/installs. I've installed/owned several of each. I'd go so far as to say not ONE of you could tell my HDC's apart from a Q....until I turned it up louder then the Q could get. They both sound VERY good for a daily set up and will get loud and hit low.
To the OP.....why the hell are you SOOOOO over analyzing this shit. It's a **** hobby not life or death, buy a ****ing sub already and throw it in a box and decide if YOU like it. NO ONE on this site can tell you what sub you will like better, only your ears can do that.
At this point I'm ready to recommend ANY sub but an HDC or Q as you don't deserve either of those fine subs //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif
Oh yeah......did ANYONE actually read and comprehend Scott's post about the BP option and it's REAL purpose????? Sure doesn't seem like it...