Blue-glass bulbs are never, ever the right choice for optimal safety performance (seeing) from vehicle lamps -- period. It does not matter whether they're branded PIAA and cost $40/bulb or branded Sylvania and cost $40/pair or branded anything else and cost anything else. Blue-tinted glass does not make the light "whiter" or "brighter" in any way, shape, or form. It does not improve anything about the light. All it does is change the appearance of the operating lamp and reduce the beam performance. It's just simple physics, really.
Presently the best bulb is the Philips Xtreme Power. It runs right up against the upper limit of allowable flux for the bulb type, has a very high luminance, compactly-wound filament very precisely focused within the bulb glass, and does not filter the light through blue or other-color glass. That is the recipe for optimal performance out of a bulb.