kappas are great speakers if ya gunna do the conversion i would go wit a infinity 6.5 component system... search for better prices and get a warantee with ur speakers.... ebay stuff is almost never covered if ya lived in NJ drop me an email and ill tell ya some places
or go the route me and my bro took pioneer 6x8 compression horns all around nice bass response and when amped (his car) the play sooooo loud very little distortion (they are x-overed)
afr0
pioneer head, 4 pioneer 6x8 compression horns, (pioneer 4 channel coming soon), 2 12" infinity perfects, powered off a infinity beta digital 300, 1 farad cap, mtx crossover, audio control line driver (coming soon)