ATI Radeon with 6 HDMI monitors

Trying to connect 6 Acer 27 inch K272HL monitors to ATI Radeon 5870 mini display ports. They all have HDMI no display ports.

I know I need active adaptors for the first 2 monitor. Can I just use 6 active display port adapters on all of them.

Does anyone else have this configuration?

Thanks