You plan on buying some spyder/spec d projectors or doing a retrofit to the stocks? If you are handy and a little fearless, I would suggest going on theretrofitsourcedotcom and checking out their morimoto mini 6.0 kit. They should also have the right relay switch. It will be bi-xenon (lo and high beams HID out of the same projector). I think you can search your vehicle and they should have a kit with everything you need. Just choose the Kelvin and bulb type.
If you already have the OEM projectors, then it should be fairly easy. Use a heat gun to melt the seal and pry the clear from the rest of the headlight. Taking out any screws and bulbs first of course. Then take out the stock projector, put in the morimoto. make the connections inside the light. Seal it back up. I used the oven on one of my projects and it took forever and didn't work out so well. A cheap heat gun worked better and faster for me on my Hyundai genesis. Im sure youtube has a link for ram headlights.
If you have the quad lights, you can still do this, but might need to modify the hole where the bulb goes in. The morimoto projectors have a threaded shaft that would go in the bulb hole then you tighten it down.
So if you keep you stock headlights, the morimoto kit shouldn't be more than $300 or so. You will have crisp BMW type headlights, not that horrible looking hid in a reflector dish blind on coming traffic garbage. The morimoto projectors probably have far superior optics opposed to oem ram projectors or spyder/spec D.
It takes a solid day's worth of work to do it right, but you should get great results for a decent price. And you wont be without your lights for an extended period of time (in case the retrofitters don't do a core swap).
Just my opinions, I do not work for nor get any kind of reimbursement from anyone I mentioned above.
I just looked at the retroshop and he has a lot of great stuff there. Im sure the prices are on par or better than most as well. Looking at the size of the dust caps, I don't know if you have to disassemble the clear plastic or not to do a basic retrofit on the OEM projectors. I have yet to get into mine.