I'm thinking about getting Gieseman bulbs too. Keep us posted on how it turns out once they are broken in. The colour you see now may change.
How long did you run your ARC 14000K bulb for? I've had no problems with them and the colour is what I expect from a bulb rated at this temperature. I find that they need a long burn-in time. One or two weeks and the blue subsides quite a bit giving a much more balanced look. When I first fired them up, yes, the intense blue did tire out my eyes rather quickly. It was like staring into actinics.
