250W Ballast/Light Combo Fixtures?

Hey guys, I want to buy a 250w light for a CMH bulb, but I was wondering if anyone has used a fixture with the 250w ballast Built-In? Are they reliable? I was thinking the SunSystem2, but I want to make sure I'm not wasting my money.

Good choice on CMH, and yes those sunsystems ballasts are reliable.

I would think about a 400w unit if you can swing that at all. It would be about the same price.