When I was a kid, I was in love with the Galil.
I've always kinda liked the Stoner 63 system- very versatile. I'd take the SAW version with a 200 round box mag (it can also take drum mags). A lot of Vietnam SEALs loved 'em, although I read somewhere that there were some safety issues.
BIA, as an RPD fan, you'll appreciate this quote from
SOG: A Photo History of the Secret Wars by John L. Plaster.
"Examining a captured Soviet RPD light machine gun- at 15.4 pounds the lightest belt-fed machine gun in the world- some recon men found that its barrel could be swawed off and the gun would still function flawlessy. This SOG-customized RPD was chopped down to about 31 inches, cutting its weight to 12 pounds- shorter and a bit heavier than the Thompson submachine gun but firing the full-powered AK round. The sawed-off RPD was well balanced and handled so perfecly you could write your name with it. The SOG men added a jury-rigged 25-round metal belt segment to boost its capacity to 125 rounds and inserted a slice of linoleum in the drum to eliminate any rattle. At close range it was the most awesome weapon in SOG recon."
Nice.