Go for the Sportsman, for the same money, you get a whole new airfoil.  I have both the Sportsman, and vg.  The reason for the vgs, was to keep airflow over the control surfaces at the extremely slow speeds that I use. Otherwise, they did not lower my stall speed anymore than I had with just the Edge cuff.  I ran tests before and after.  First I installed the Sportsman, flew and measured airspeed, then did the vgs, and repeated the speed tests.   No difference, but because of a past experience of losing ailerone control when flying behind the "power curve" with a Horton cuff, I added the vgs.
vgs are effective, but not as effective as the leading edge cuff.