I;ve been running PIAA Xteme Whites (H4) in my GV for about 3 years. These are real PIAAs and not the knock-offs.
One word. Awesome. Difference is night and day. Many flash me thier brites when I head there way. My high beams scar retinas. If they hogh beam me back, I just kick on the 85w PIAA 820's and 100W PIAA H1's in my Cibie lights. That ends the bright light fight.

Also, if a PIAA ever burns out, they replace them, free. Forever.
But the $75 price a high. But you pay for good stuff.
Bob has Sliverstars, and the PIAAs are way brighter, and more pure white/less blue tint.