Allow me to suggest a few changes..just for fun!
Keep the sweet 6 Kappa's but add carpet spikes to the stands for tighter, deeper bass and smoother mid-range to tweeter transition...and better imaging.
Replace the old JVC cables with Linn Analog turntable cables and RCA jacks, and maybe find a vintage Acutex M-312 STR cartridge.
Then, for the heart and soul, find a good Pioneer SX-1250 receiver, have it completely re-furbished, then add some Tara Labs RSC speaker cables, and WOW!
IMHO, the Carver pieces are limiting the sonic ability of this system dramatically!
I can't imagine a more enjoyable 70's and 80's sonic experience!
Cool Toys VV, enjoy!