Oakleys – all are ballistic spec. SI spec if you can get them.
A hammock. Can be strung up between vehicles etc if needed, way more comfortable than the floor/kip mat. Not one of those nasty string type ones though. Google DD hammocks.
Altimeter – SUUNTO
Thermals, decent socks, head torch, Garmin wrist GPS
All of above is stuff my mates in the marines found worth while.