New cartridge for Eminent Technology ET2

I am running an MC Sigma Genesis 2000 on an ET 2 with the damping trough on a heavily modded HW19 MK IV. All purchased together over 25 years ago. I have all the original kit that came with the ET2.

I am thinking of upgrading to the heavier and lower compliance Hana Umami Red.

Caveats, recommends, etc?  

I have glanced at the very extensive ET tonearm thread and would rather not read all 47 pages. I've gleaned I need the magnesium tonearm and should lose the trough.

Tom