Well you have a few options here.
If you are wanting to just put HID's in your Ram I'd recommend you check out retrosolutions for a nice kit. I'd also recommend you get the 55W 5k if you want that OEM look and great light output.
Now if you want to get the halogen projector changed out to an HID projector you need to head over to the retroshop(dot)us. There you can see about getting that projector changed out and getting HID's.
The retroshop will give you the best results for light output.
Here are some pictures.
Stock projector, stock bulbs:
Stock Projector, 5K 55W HID bulbs:
Output of stock projector 5k 55W HID's:
Now here is the same headlight with that HID projector installed.
Looks about the same right? Well..
HID Projector with 5k 55w HID's:
Notice the nice sharp cutoff vs the stock projector. The HID projectors also project the light much further than I can capture with a camera.
Hopefully this helps a bit?