Yeah, all the hard core guys like to bash the NP203.
But if most of your use is on the street, I'd strongly recommend you keep it.
Most other T-cases are never recommended for pavement or hard surfaces.
The NP203 is more like a modern AWD system, exactly what you'd like on wet,snowy, or icy pavement. Most new trucks aren't available with AWD, you've got to buy a Durango to get it.