The PIAA's are nice, that's what I have had for a long time now, still going strong. The only thing is (for me at least) they fit in there pretty loosely, and occasionally I find one isn't on, so I have to get in there and press it in more firmly and then it's on again. Not something that happens much (twice, in a couple of years' time I guess), though. As loose as it is (both times it was the right side), it is amazing it doesn't happen constantly, especially with the stiff ride and some of the places I take it. Really I'd expect it to fall out of socket with the first little bump, but they don't. Not sure if it's just my VX, or my particular bulbs I got or what.
WormGod, I've had no heat issues with the plastic, and they are a little on the blue side, but just a tad. Really don't think it would be a problem. It's not to the point that it is going to draw any attention when you pass by Johnny. Especially having the headlights on with them as you probably usually will. Then they look pretty white. It's when they're on by themselves that you can see the blue hue, and even then, it's not so much when you're looking directly at them - it's when you're looking at what they are illuminating that you notice the blue. My headlights drown out that effect.
I have the Sylvania SilverStars in the headlights. Not an exact match maybe, but that's really splitting hairs in my case because it's close enough to not look wrong in my opinion.
MrcIn1, the SilverStar part number was 9003ST.