HPS for the win!!
I'm sure the really expensive LED's are great, the gram per watt might be a little better too, but you can start a large grow room for the price of a single quality LED. The quality of the finished product definitely won't be much if any better with an expensive LED.
I'd say if you want a little bit for yourself, can't go wrong with a 600w HPS. If you want to cash crop, several 1,000 HPS lights are the way to go. If you have $20k to blow, LED is cool, definitely won't absolutely crush the HPS though.