Am reconfiguring my speaker system. MFA and Audio Research electonics, 12x25x9 room, don't listen at ultra high spl and ultra low extension is not key; main speakers likely to be custom designed Raven R-2 with either Focal or PHL mid/woofers (should extend to 50hz). system is for music only; no home theater use. Am considering either: 1. a Vandersteen 2WQ (powered; $1300 retail)-- it has received alot of good press for music applications or 2. DIY: Lambda Acoustics SAL SB12 driver in a 22" cube-sealed cabinet (both from Stryke) with a modified AC Richter Scale (eq and x-over) and a QSC 850 amp (all in about $950) The cost differential is irrelevant. Any thoughts on how the two would compare? What other sub, diy or otherwise, would beat them out for music applications?