I use Olson's #5, #7 and #9. I buy them from Sloan's Woodshop or Seyco. I've found these blades to have the sharpest edges, they stay sharp very long and the finished cut is almost polished! I never need to sand the inside of my cuts. I have also tryed the O;son Mach speed, they are as sharp as the PGT but do not last half as long as the PGTs.
I'm sold to the PGTs