Well, I own all 3, SAM7K, M92 and Galil Ace 39. The only thing I have done is add the non folding SB pistol brace to the M92, and some mods to the Galil, and nothing yet to the SAM7. The one I am intrested in right now is the Galil. At $1700 it was the most expensive but maybe the nicest. I removed the plastic mag well and added the micro hand guard.
About 10 years ago I SBR'd a Draco but that route is expensive and trying.