PIAA is, indeed, a good name. And those certainly are pricey. But here are some things to consider:
1) Like HID kits, these *are* going to produce a lot more glare than halogen. How much more or less, hard to say without testing.
2) Unlike HID, they have no ballasts nor igniters to fail, although it does have a "controller" of some sort.
3) Unlike HID, they switch from high/low beam electronically, not physically.... so they have no "movement". This is better because there is less to fail and there won't be an annoying "jitter" in the beams like in aftermarket HID kits due to the flexibility of the bulb retraction system.
4) But they do have FANS that can (and will) fail. In a bike application, unlike a car application, those fans are likely to get wet. If the fan slows or stops, the bulbs will fail (LED bulbs hate heat).
5) H4 bulbs are supposed to also shine light DOWN when on high-beam. And the photos of those bulbs look a lot like HID kits with shields, up-lighting only. This means, just like shielded HID aftermarket kits (such as the A&R), you will get only a partial high-beam pattern. The entire bottom of the C14's reflectors will never be used.
6) 6000K is not the "correct" color when compared to OEM HID color- it is a little too blue. I believe around 4300K is the OEM HID color on all vehicles that have factory installed projector HID systems. But it is not crazy off... certainly not ridiculous like 8000, 10000, and even 12000
