The KX3 is a great picnic table radio.
The end plates and cover by AK6Q provide a bit of protection and make it more backpack stuffable http://gemsproducts.com/
These were instrumental in me finally pushing the buy button on the KX3.
However the KX3 would probably rattle it's self to pieces if you hard mounted it in a jeep and drive off road. It also lacks the grunt needed to overcome the inherent inefficiencies of short mobile antennas.
Bottom line as I see it ; there is no one radio that fits all :
KX3,FT817 or 703 etc. for hilltop portable. Same list plus K2 for picnic table use.
A 100W compact or remote head radio for vehicle use - lesser RX rejection performance probably ok due to the narrow BW lossy mobile antenna.
A IC-7200, K2-100 or KX3 plus PA would work well at home.