I have a hidden hitch front receiver hitch on my 2004. 5 Q-cab 2500 4x4. I paid right at $100 for it from etrailer.com. It was a pain to mount as one inch holes must be drilled in the bottoms of the frame. It is rated at 9000 lbs. My main reason for purchasing it was to protect the bottoms of all of the coolers mounted to the radiator. For a 4x4 with a tin bumper, these are really exposed. A secondary purpose was to help move my travel trailer in tight spots. Finally, if I ever decided I need a winch, I can mount a removable one.
The only problem with the stock hitch is that the receiver pokes out below the air dam. This doesn't help an already bad approach angle. I had my local 4x4 shop, Fly-N-Hi, move the receiver above the hitch cross member and cut a hole in the air dam. It looks good with a RAM receiver plug and is truly a "hidden hitch" now.