i'd want reach and agility. the biggest, lightest knife from the yard is the DFLE.

a knife i purchased recently and decided i didn't like at all was the cold steel laredo bowie. it's very swift in hand with a very fine point and a long blade. i couldn't improve on the design if i wanted to. i just don't like fighters.

i'd rather have the soviet shovel, a tomahawk, a sirupati, or a tarwar. less poke, more dismember.

klink already posted the best tool for the job.