By the power of truth, I, while living, have conquered the universe.
Sigh... Looks like SPI has been neglected again. 6 years I've been hoping it would show up in a Halo game as a MJOLNIR variant (yes, I'm well aware it's a totally different kind of armour, but they can easily make some BS excuse up like they did with the ODST armour to 'MJOLNIR-ise' it).
Anyways, looks like I'll either be using Rogue or Orbital. That said, Venator, Wetworks and Pathfinder look -blam!- awesome.
I think that your first 'unknown' helmet is a JFO remake, OP.