There was a previous thread on this, as i recall these were quite expensive. Try a Google search, consumer reports, etc., you are right to be concerned about ozone, it also causes problems with anything using rubber. We use a MERV 11 filter, but if you still more purification, IMHO, get a small electrostatic filter, and put in the bedroom, and close the door. The AC system will still be circulating air in and out of the room, but the additional filter should keep the dust (etc.) to a lower level.
Hope this helps.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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