I am up to 6, (7 if I count the Backtracker that stays home).
1 x SLE
1 x B Std full
1 x B Std mid
1 x B Std vented
1 x 75% Shook
1 x String-Art Rainbow Gradient
I have warned my wife that the String-Art may not be a replacement for my full-sail that is wearing out, so a B Pro may still be in my future.