I think a for an all arounder including chopping, splitting, food prep, game processing and defense/offense the Basic 7 is [censored] hard to beat. It is also a super light package and the M-INFI takes and holds a GREAT edge. As many knives as I have my Old Basics still get picked first. LOVE 'em!!
YMMV.
I chose the B9 as my "one knife" simple because of the extra reach.