i feel for you. We went through that when my car was broken into last fall. They smashed my window ($500 to repair) to steal my gps ($100), my xm radio (worthless), and my wife's knitting.
k701, k501, hd580, hd650, sr225 can all sound better with the right amp than k1000s with the wrong amp.
Given $3400 to play with ( 2 pairs of K1000s + big joe amp), I could put together a spectacular headphone rig AND a spectacular speaker rig.
I don't have a good k1000 amp, I don't own K1000s, they're overpriced even at their best.
But you could sell one pair of those, get a firstwatt, and have money left over.