All right, so I think I've decided on some upgrades for Marvin. At the moment I'm planning on a more horizontal (more guns, slots, etc) approach before going vertical (better guns, tech, etc).

Thus, here's what I have.
1x Right Shoulder Slot (both shoulders if at all possible). Shifting the HE Missiles there.
Installing a .50 Calibur Mini Gun in the Right Arm
1x Torso Slot. Installing a Motion Detection Package.
1x Back or Torso Slot (not sure which I want to do)
1x Invented Item:
[b]Drone Deployment and Control Center:[/b] This package, about the size of a small backpack, allows for the deployment of aerial drones, controlled by the pilot's glove. Drones are stored inside of it, which recharges their batteries and protects them from onslaught. It's current capacity is only one drone, but can be upgraded to hold more. Also comes with the programming make use of the cameras aboard the drones.

Speaking of the Drone...
[b]Valkyrie Mk. I:[/b]
[IMG]http://img3.wikia.nocookie.net/__cb20100210152733/cnc/images/0/07/Gen1_Battle_Drone_Icons.png[/IMG]
Type: Aerial Drone
Equipment: Drone Sub Machine Gun, Video Cameras (Ability to see in any direction at once).
Description: This rather simple drone design has often been cited as little more than a gun with a helicopter on it. However, this drone is highly prized for it's mobility, being able to get into places that would be highly hazardous. Perhaps the most striking aspect is not it's weapon, but rather the camera that Marvin placed into it. This makes it a valuable scout, able to see dangerous areas before sending in the more vulnerable (and valuable) humans. With the Drone Deployment and Control Center, the pilot can see everything the drone sees.

Ability Gain:
[b]Technology Marches On:[/b] All pilots are now equipped with a pair of nanotech gloves which have wireless technology. State of the art, these gloves allow them to attempt to hijack the controls of an opposing mech at short range, and grant them access to a small, mechanized companion. This can be anything from a small aerial gun drone to a robotic puppy. Their "companion" has two ability slots and so long as there is no interference in the gloves, will obey every command given to them.

The gloves are also quite hardy and thick to protect the nanotechnology, however, they aren't indestructible. Given that you will typically be wearing these gloves however, if they are damaged, it should be noted that the amount of force or heat to damage them will likely completely wreck the user's hand. So it's only a small concern, so long as the technology isn't hit with an electromagnetic pulse or other similar device-ruining weapon.