As a like for like I'd go with an MS130-8 model. You could upgrade to the MS130-8X if you want the possibility of adaptive policy in the future. In reality any Meraki switch can be a DMZ switch as long as you give it access to the Meraki cloud for management and updates.
The only place I personally don't use Meraki switches is on the outside of the firewall where ISP connections need splitting to one or more devices. I would always recommend using either an unmanaged switch, or one with out of band management in that location. Cisco make many small cheap switches for that requirement.
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