Sounds like you've had enough of hearing this but the RM4 ERG is worth checking out. When I decided to get a good electric gun two of my top criteria were what you're looking for: fights back when you pull the trigger and doesn't keep cycling when it's out of ammo.
I ended up getting a RM4 Scout and i'm real happy with it. Two downsides that come to mind with the RM4 is the recoil is front-to-back instead of up-down so it doesn't take you off target and the 'bolt release' is really wimpy.
But the build quality feels really solid, it's accurate and it sure is purty...