I like many before me am replicating ODST armor on Reach. I am not personally asking what to use, but I am just seeing what you all would or have done to replicate it. I use:
ODST Helmet Base
ODST Shoulders right and left
ODST Chest
GUNGIR Kneeguards
Trauma Pack (I like being a medic-type guy)
GPS wrist (I assume an ODST would need something like this in case of an off course drop as in Halo 3: ODST)
Black Visor (I would use silver, but I prefer to separate myself from Noble team's armor as much as possible, and Kat has a silver visor)
Default Firefight Voice
Default or Eternal Armor Effect (default for competitive, eternal for FF and Grifball)
Tell me (us) what you use!