You know, maybe those cheap import ebay turbo systems aren't the best, but for the price, if nothing else consider it education for someone trying to learn turbocharging.
For a little money, and a lot of blood and sweat and tears, you can get one on your vehicle, and run it for a bit. If nothing else, it will be a decent way to learn some skills, and learn some stuff, and drive it for a while, while deciding on a more expensive kit.
Thats my take on it.
Is a 1000$ turbo kit as good as a 10,000$ one? probably not.