I voted for HARM, just because many of those poll options rely on the other options to be effective.
For instance, it’d be tough to get really excited for LGB or JDAM without a working ATFLIR and we still don’t have the ability to input MGRS versus Lat/Long.
We don’t need anything new for HARM other than the DDI page and the weapon itself. With one addition, the Hornet gets a major capability not available to many player controlled aircraft in DCS.
I hope that the implementation of HARM will also involve an update to the AI to allow targeted radars to shut down and evade shots. I would be severely disappointment if HARM would be modeled as one-shot-one-kill weapon, while operationally the missile had a hit percentage in the single-digit range.
I have written a script to simulate radars evading ARM shots, but it’s ugly as it requires to de-spawn missiles when a radar shuts down (otherwise ARM in DCS continue to strike targets). I hope that AI reaction to ARM gets properly implemented to the base game to do the HARM justice.