I can attest to the importance of armored Humvees first-hand. Had my husband not been in an armored Humvee the day an IED exploded under his vehicle, I would be a widow right now.
The old Humvees, most of which already survived the first Gulf War, should have been replaced a long time ago.
All humvees should have a kelvar shell. And the underside should be most heavily armored.
God bless you and your family for your service.