I put one of those cheap tool posts (AXA size) on a Craftsman 12x36, and it worked just peachy. So well, that I put the $250, piston-type, in the CXA size on my Sebastian. I don't know what I could get from Aloris or Dorian that would be worth 10x the price.
I've got a few 3/4" toolholders. They seem to be more rigid, but truthfully the 1/2" set work just as well and was only $50 for seven toolholders. I got a half dozen ten-packs of inserts from Alibaba at about $1.50 per insert. I wouldn't trust them for production work. . . but, then again, I'm not doing production work.