I would like to replace my EP350 w/ an SVS 20-39 PCI+, but the EP350 is no slouch. It rattles the walls and wakes the baby. After toying w/ crossovers, phase switch, and placement I have it set up (by ear) where the bass is extremely tactile. Heavy, thudding, grippy bass w/out any booming at all. Very good for music.
I'm curious about that particular SVS, though. The ability to go really low and loud (525 watt amp?) would be fun. And in my set-up the taller cylinder would have a much more elegant appearance.