^^i agree here^^ i would add precision power (power class or art class), and xtant.If money is no problem. For really clean pwr, SQ and good pwr. I like ARC, Zapco, Audison, Sinfoni, JL, Eclipse. I have used JL in the past and been extremely pleased. You could use a JL 300/2. Are you doing passive or active? Active for 2-way set-up I would go with 4 channel. If using passive go with 2 channel. I cannot remember are the K2 bi-ampable. If they are then you can go 4 channel with passive set-up or 2 seperate amps, 1 for midbass and 1 for highs.