Nice idea, but I think separate stats for each weapon (not only knife) would look much more useful. A cvar can be added to switch the weapon stats mode you want to run on your server. For example
w_stats 1 - run stats for usp,
w_stats 2 - for glock e.t.c. and
w_stats 0 - for all weapon. As for client commands /usp15, /glock15 e.t.c. to see the top15 players, according to the selected stats mode. It's even more easy to put the features I mentioned into statsx.amxx
