You don't mention if you like your current sound or what you're hoping to achieve with the new IC's. Your listed choices would seem to indicate that you don't find your system "bright", and want resolution above any "warmth". I've found that the best IC's in my system(including a Unico) are VH Audio Cryoed Pulsars. They cost less than your listed choices and come with a home trial period. They do, however, require a long burn-in time to sound their best(200+ hours).