The lows have been perfect since I put them in about 10 months ago. The highs are 55w (don't remember the brand) but one of the ballasts takes longer to warm up then the other sometimes.
The 194 LEDs are from amazon, AGT brand. I have had a couple of those stop working, but I'm not sure how reliable the eBay Chinese ones are. Plus, these are dimmable.
I haven't tried cree LEDs, but I've heard they are really bright. I'd love to mess around with some of them but they are expensive.
I was messing around with 5mm square flux LEDs. I want to replace both tail lights with them, but I haven't gotten around to it yet. Those are nice, you can attach them easily to bread board like legos.