Any good shielded mini monitors?

I'm looking for a pair of shielded mini monitors to place on my desk on the sides of my monitor. My price range is <$500 (used). Any recommendations will be greatly appreciated. System is NAD L40. Thanks in advance.

I am not sure if they are shielded, but the Soliloquy SAT5 might be a good option. I have a pair in my bedroom system. Website is
An excellent pair of monitors for the money is the PSB Alpha A/V. They have been discontinued, but you can still get them for around $150/pair. The PSB Alpha mini's (about $30 less than the A/V) are also excellent, and slightly smaller, so they might fit better.

Good luck!