hsu tn1200 is wonderful...takes up little floor space, but as my wife likes to say, "it's the size of a small human." it's a passive sub and can be bought new for around $450. very hard to come by used, but a used high current solid state power amp is not (if your processor/receiver has a built in crossover....). i haven't heard the VTF-2, but it has excellent reviews and is only $499 new. good luck.
