Thinking of upgrading the low end grunt in my current setup as the pair of Yammy YST-SW120 subs are running out of puff in their old age and I need some extra slam. Considering the SVS range but not sure if the PB10 will suffice? The PB12-Plus would be even better but not sure if it warrants the extra spend. Room approx 16' x 15'. Anyone offer any advice or opinion? Live in Scotland so getting a demo is gonna be difficult.