looking to upgrade from B&w 805s to full range

If you like B&W sound, look into used 804D3 or 803D2. 

On second thought, do you have any subs in the system? If not then add a pair of REL subs, with REL’s you are in for a treat. You will experience a whole new layer of tonality that brings music more to life. The imaging along with every detail from top to bottom will improve as well.

There is no other sub that will provide seamless integration as REL using its unique high-level input.