Need a flash unit for 645AFDII/Aptus 22

[ericevans]

I need a good flash unit for my Mamiya 645AFDII/Aptus 22 . Any ideas on what is going to work well with this unit ? I am thinking a Metz would be best . I need a unit that will allow me to shoot macro at iso25 at f/8 at 1/125th . I may also use it for people shots at some point in time . What should I get ?