Here are my choices :
GEN2 WE 416, which I would completely gut and replace all the parts with RATech internals. The thing that gets me is the price of the CO2 magazines, I want CO2 over GreenGas because the regulation system will allow me to have a more consistent pressure than the GreenGas.
KingArms Ghalil, new version, real wood, all steel.
KingArms DarkEarth SIGHolo , the good thing about this gun is magazine compatibility.
The gas is what I've always really wanted but the CO2 magazines will be a very large hassle....much larger than the GreenGas magazines, however if I do get the gas gun I want it to have the best performance I can possibly squeeze out of it.