With projectors, you at least are not likely to blind other drivers. To the statement that "it will work fine"...maybe. Because your projectors are designed for halogen bulbs, they likely bias the light out in front (vs. providing a lot of light to the road sides). With re-based HID "bulbs", the foreground and roadway will likely be over-lit, and you may or may not have better down-road vision (with your pupils constricting because of the over-lit foreground).
The best way to see well at night is to optimize your headlamps (making sure they're clean and using the best light source possible -- in this case, known good performing halogen bulbs), and to turn down your instrument lighting. In most modern cars, instrument lighting is best classified as disability glare -- the foreground lighting causes your pupils to constrict and it competes for your focus. Turn your instrument lights down to their lowest possible setting -- it's remarkable how much better you can see at night.