You also have to consider the M1 Abrams is a 30 yr old design, as is the Bradley and Humvee. The Kiowa is even older and so is the Littlebird(Vietnam). There really isn't anything cutting edge out there. I would love to have an MRAP or something like that. I suppose with a LOT of work, the POC Vamp could be customized to resemble and MRAP.
We need someyhing like the PAK FA in the very near future.