Funnily enough I ordered Sonarworks 4 a while ago and gave up on it arriving and cancelled the order, but it arrived this afternoon LOL Just done a quick setup, pretty impressive! I find the holding the mic bit a little strange but it makes sense with the number of measurements taken (I use DIRAC Live in my home cinema). Totally transformed the KRK's, obviously won't change the noise issues with them but they will do for a while now. Ordered a calibrated pair of cans as well so looking forward to hearing those.
I thought the Opals were really impressive when I used them before and found them very easy to use without ear fatigue, they were only noisy (low hiss) when they didn't have a signal going through them. The low end on them was brilliant, I will investigate the Kali's for sure though.
Cheers
Paul