what type of amp should i buy to complete my system? i have a self powered sub, so i dont need to worry about that, i have a clarion proaudio receiver, kappa perfects up front (100w), and some other kappas in back (62.5i i think at 75w)..i need something to help the highs, b/c if the volume gets too high, then the sound is scratched...i am figuring i will need like what, (25-100w RMS, 400w peak for perfects...2-75w RMS 225w peak)? help me out here