I have old-school daylighters at the windshield corners, and really like them a lot (I like the old look). They were like $130 to my door, with all the wiring and relay included. They came with a switch, but used a switch that matches my others. As stated, they do block some view, esp when making left turns. I'm 6'1" and got used to the reduced view pretty quick. My wife is 5' and think's it's a lot of blockage.
I have 7" Chinese HID's on the bumper, and they work great. I got them for $208 a set, delivered. That was a few years ago though, and I think they are more now. The same light is marketed at much higher prices through several name brands. They are around 6,000 K and a little blue for my taste. I plan to replace the bulbs with a 4500 K bulb for $20. That should bring the color range more in line with the headlights and daylighters.