No matter what kit you put in the standard projectors, the light output will be shit (thing pencil beam with lots of scatter).
The $30-50 eBay kits from China will die in a couple of months. The more expensive ones last a bit longer.
The kit I currently use (2 years running) is a fast start one that was almost $200. The equipment from The Retrofit Source are so cheap these days, you'd be fooling yourself not to buy from them.
Opening the headlights and changing the projector is a lot easier than you think. I did my second (current) pair of headlights within two hours.
The link I provided gives you a couple of options (including mine).
The difference between a retrofitted and a standard headlight with HID kit is so massive, you'll have to see for yourself (put cheap HID it into standard headlight, then go park next to a car with factory HID lamps).