Maybe I'm reading you wrong but what do you mean by "they have the low sunk neck and recessed trem"? I can pull notes up plenty far on rgs (prestige and stock 520 or 570) with the trem. And I dont feel THAT much of a difference in the neck joint on a jem to an rg. Rg's have an edge, which Steve still uses on a lot of his guitars and satch prefers to a lo pro. Personally, I do prefer a jem7vwh and dbk (though IMO I'd put hotter pups in a dbk, I dont feel distorted tones are full enough on the extremely light body) But for a good workhorse guitar that is easily convertible and customizable you cant go wrong with an rg...my point after all is that it's easier to slap some dimarzios in an rg than trying to convert a trem cavity from lo-trs II to edge or lo pro edge.
-I wouldn't buy a korean rg...only a japanese model.