The HMMWV isn't too bad. A little much on the mud splatters. The underside is pretty bad still, just keep it on its wheels and it should be good.
The DCU uniforms have 3 colors to them, sand, khaki-green, and brown. Like so:
For the time period when unarmored M1025s were used, the initial invasion in MAR-APR '03, the IBA body armor should be woodland camo as well.
It looks as though you have the HMMWV marked in the 3ID markings. 3ID didn't have any M1A2 SEPs. We had all M1A1s. Also, 3ID and 4ID units would not have worked together. You also have the M113 in 3ID markings.
If you are looking to have an M1A2 SEP with an unarmored M1025, the unit should be 4ID. They were the only M1A2 SEP unit that was here while unarmored M1025s were still in use. 4ID was in country from late APR '03 until APR '04. By late '03, IEDs became an issue and the vehicles started having either home-made armor plate applied, or ASK (Armor Survivability Kits) were added. So the kit decals would be your best bet.
Also, don't take such close up pictures. They don't really show anything and just end up blurry.