There are few things you can check with your stock headlights to make them work better.
They have headlight restoring kits that can clear up any glazing or fogginess of the outside lens. Also, you can check to see that your lights are aimed correctly. If they are out of alignment and/or pointing down, that could be an issue as well. Your lights are over 10 years old now and might just need some tlc, new bubls will help too.
When putting hid's in the stock housing, what most people complain about is the scattering. It may have more light output but its not going to be directed well and possibly have even worse visibility for you.
Case in point, this very recent thread