I think your budget is too low to compete with the magnepans in a box speaker. Used I think you could get into a comparable speaker for $2000-3000. I would not consider Gallo or ZU conventional (never heard either).
You might like some used Thiels too. Being that they are quasi point source they will stage/image much differently than the magnepans. That is if you are just looking for different for the sake of different. PSB is another band that has very good "cheap" speakers. The list of box speakers is nearly endless but very few (if any) will outclass the magnepans in your price range.
It make take a few hours to get back into box speakers. At first they may sound odd. So give your first demo a little more time to adjust.
You might like some used Thiels too. Being that they are quasi point source they will stage/image much differently than the magnepans. That is if you are just looking for different for the sake of different. PSB is another band that has very good "cheap" speakers. The list of box speakers is nearly endless but very few (if any) will outclass the magnepans in your price range.
It make take a few hours to get back into box speakers. At first they may sound odd. So give your first demo a little more time to adjust.