I've had KRK Rokit 5s and now own JBL LSR305s (one of the Rokits had an internal tweeter error after a couple years, necessitating a new purchase).
To be honest, I think the choice of monitors isn't that crucial in most situations. What's more important is that you learn YOUR monitors. Monitors' sound can be substantially affected by the placement in your room, for example. The key is to know how yours sound so that you can get your intended result.
To do this, constant comparison is in order. Play your mix back on your monitors. Then go in your car in listen. Listen to the differences (especially with low frequencies). Tune and retune. Listen to your mix on earbuds. Tune and retune....etc.