I had the same problem and choose Harbeth's. They have a port in the front, whereas most speakers have ports in the rear of the speakers making the bass muddy when close to a back wall. You can find used (and new) ones easily for your price range nd they have several sizes available. They are good for all types of music, especially voice, although heavy or death metal is not their best forte. They also sound good even with low "Background/dinner music" volumes, which many speakers are poor at.
Obviously speakers with sealed cabinets would also work or any 'monitor' type speakers front ported. Just mainly avoid those ported in the back in my opinion. Hope this helps.