Speaker Suggestions

Monitor Audio.

Any specific series from Monitor?

Vandersteen would be something you should audition, especially if you are moving from B & W.
A pair of 3a sig used should come in at your budget. But even a Model 1 with some Vandy subs would be a killer system for a regular sized room.
Bob

Is this change for 2 channel audio listening? If not, keep in mind you will need to change center and rear to timbre match the L & R for multi channel music and movies.

Any specific series from Monitor?

I like them all, but Silver is more punchy, platinum much more neutral and reference quality. Platinum better for a variety of music and HT.

You should listen for yourself, but also scout around for sales. Audio Advisor or Parts Connexion sometimes have recently discontinued items for a song.