I have the old KRK rokits (the angled side ones and passive with a hafler amp), I borrowed a pair of event TR 6 to compare to. When I get some money I will be getting the Events. In my room (the thing you really have to look at), and without any treatment, I found I had a better sweet spot, tighter definition in the low mids, and a more natural sounding high end. I was shocked at what I wasnt hearing before! Since these were the 6s the low end still seemed "forced" but that may have had something to do with not having a treated room. My opinion after listening to a few similar monitors in my room, is that the KRKs while good enough to mix with, are better general listening speakers, the "B" pair.
Just my long winded opinion... your milage may vary.
The best thing you can do is do some critical listening between the ones you have, and the two sets you want. Make a list of what you like about each, what you think you are missing from the current ones, and then really listen. Then, if you can, take the ones you like home (get whomever to give you a $$ back deal if they suck in your room), and listen to everything under the sun on them for at least an hour per day for a week, taking notes about how they sound in YOUR room. If they suck take them back or treat your room until you can pin point in space where every sound comes from and at every frequency. Good luck.