Alright, so I decided for the Malativas.
* Union Contact Pro: Toe ratchet gets stuck easily. Toe straps looked rather primitive.
* Raiden Phantom: Significantly heavier than the others, straps and ratchets only average, footbed poor.
* Flux DS30: Would have been my second favorite (nice ratchets, straps), but...
* The Malavitas had even stronger, and perfectly flying ratchets. Also the EVA footbed has better cushioning, they have Re:Flex and overall they appeared to be built more solidly.
So thanks everybody!