dig this, man. i am pretty sure we both play the heavy brutal stuff (i saw your a dying fetus fan).
i know the isp sub is expensive. but if i had to sell most of my gear to pay for gender reassignment surgery, i would keep one guitar, one head, one 4x12, and the isp sub. my friends that have tried it wig on what it does. if mine was stolen, i would eat pb&j for 2 months to get another one. (this is actually a REAL statement of the power of the product. i am a trucker, and eat steak and seafood all the time. food is the only thing i really enjoy on the road, so to say i would eat pb&j to buy a product is a true endorsement)
i know, i know....we all have other gear we want and it's hard to justify $1300 for something that just does bottom end. but in the past couple of months i have seen 2 of them pop up on ebay used, once for 850 and another time for 600 plus shipping.
the cabs i have that have 15's in them are cool. yes, they add bottom end. but seriously, it's not like the isp sub. i really wish you could come down to texas and try this thing out.
sell your plasma. sell your sperm. sell your grandma. thank me later.
(funny thing is, i picked up a warhead 2x15 cab in washington d.c. a week ago. it's sitting in my trucks sleeper berth behind me right now. i was surprised it fit through the sleeper door. juggernaut is coming down this weekend to try it out.)