Don't have it yet, but there will be a SVS 20-39PCi or 20-39 PC+ in my future. I heard (actually, felt) a 25-31PCi once. I was hooked well before I bought ANY of my system.
Future Subhuman
M-
M60s/VP150/QS8s/SVS PC-Ultra/HK630
Sit down. Shut up. Listen.