Alright, so I can get a HSU VTF-2 in my area for $250 used but in good condition. I'm thinking I can sell my current sub for around $125 to someone at my school, so for $125 it seems worth the upgrade. What do you guys think?

-- my setup -- Axiom: m80ti(2), vp150, vp100, qs4(2), hsu vtf-2 Harman Kardon: avr-630, dvd22