It depends on how much money you have to spend out of the gate. If you have the money, go with LED. Look into Guru or 357Mag lights. LED cost more off the bat, but to get the same amount of usage from a HID light it will literally cost you 10x as much. With quality (key term) LED lights you won't have to worry about anything but replacing them in 10 years on a 12/12 schedule, 7.5 years on a 18/6, and 5 years on a 24/0 schedule. The money you would spend on bulbs alone for a HID setup to last that long is more than you would spend on the LED light, not to mention the larger ventilation equipment, A/C or home A/C costs, and the cost of electricity in comparison.
LED is where it's at nowadays. There's plenty of LED grows on here and on the Tube for you to see the results for yourself. [video=youtube;qRkIz7Ou9NY]http://www.youtube.com/watch?v=qRkIz7Ou9NY[/video]
IDK about you, but over 1gram per watt is more than success when 1gr/watt is considered perfect. If you have the money, go LED all the way.