+1 on Proac 1SC, I almost bought a pair years ago. Also Dynaudio 1.3 MkII, which I've had for years. When you can find either of these speakers they are in your budget.
That said, you might check either companies' current monitors and see if "newer is better" since designs change, hopefully in the direction of improvement
That said, you might check either companies' current monitors and see if "newer is better" since designs change, hopefully in the direction of improvement