Already have the Primus omnifuel and i am not sure i will ever need any other stove although the Optimus Polaris Optifuel Stove
looks very interesting and promising (i would probably buy a silencer at some point to reduce the noise)
Note that the KOVEA Hydra is a dual fuel stove, NOT a multifuel. It runs on liquid white gas (Coleman fuel) and also on standard screw thread isobutane gas canisters. It is very compact and quiet running.