Cmh reflector/fixture - does bulb position really matter?

['Boogieman']

I'm also about to buy a cmh setup, the purpose is to veg my plants indoors early spring before I plant them outdoors. I only used a T5 for veg in the past.

I want to buy a setup that doesn't have the ballast attached, which of these two reflectors would you recommend? I will be getting the Philips 4200 bulb and I'm not sure which ballast yet. I'm leaning towards the phantom reflector but would like other opinions first.

 

[CannaRed]

I have the one on the right. Only been setup for a week and a half.
I also would like to try the air-cooled model just to compare.

 

['Boogieman']

I have the one on the right. Only been setup for a week and a half.
I also would like to try the air-cooled model just to compare.

After a bit more research I think I'm going with the sunsystems reflector. Apparently the phantom reflector is to be used with a phantom ballast. I'm curious on which ballast you went with? Unfortunately I have to order on Amazon.

 

[CannaRed]

Prism lighting science. They are on eBay, Amazon, etc.