Level 2 counting systems

In everyones opinion which is the best level 2 counting systems. Zen, omega II, canfield master>? i play shoes so i am thinking zen would be better for b.c.

is anyone familiar with this website, i am wondering if the ace side count is added to the omega and canfield master Efficiencies? and if they are not what increase will there be in the efficiency?
http://www.qfit.com/cvstrat.htm

thanks