What is this frequency that bothers you guys about V30's? Is it the 5-6k spike or is it something lower? Cause some V30's can sound really smooth and not have that 5-6k spike. Also, it seems to me that it's mostly Chinese V30's that have that upper mid thing going on which usually makes them sound more aggressive than the UK V30's. They can both sound really good and mix ready though. Some do sound very spikey though, it's a crap shoot with V30's, you just gotta hope you get some good ones.
I like how balanced the karnivore is but you know it's not going to cut through a live mix as well as most celestions do, if that's a concern for you??