Era Design 5 would likely serve you well at the top of your price range. I did not listen nearfield, but heard them up against a wall. Magnificent qualities for such a small speaker. I was really impressed by them. On a more limited budget I'd agree with the Swan M200 recommendation for a powered speaker, but they won't have the refinements of the Era pushed by good amplification. The amp in one of mine failed, and I have no means of replacement (anyone know of any)? I have not heard them, but M-Audio makes a series of pro monitors that are self-powered that have pretty good real-world reviews online. Those might be worth checking out. The Era would be at the top of my list.
Marco
Marco