I'd recommend Vandersteen 3A signature, but they need more power to sound right for the large orchestras. You can also bi-amplify them or use tube preamplifier. They're much better off with solid state amplification preferably over 150Watts. It would also be better budgetwise v.s. powerful tube amps. They're excellent for large orchestras, have huge dynamic headroom and would fit your budget. For small jazz band and chamber music you can have SET(or low-power tube)/high-efficiency system if it dominates your collection.
One of my favorite high efficiency system is Avantgard Uno designed for bi-amplification with low-powered SET amp. You might also find it used to be within your budget.
One of my favorite high efficiency system is Avantgard Uno designed for bi-amplification with low-powered SET amp. You might also find it used to be within your budget.