Upgrading lights

[Spotted]

Ok, I need some opinions. I currently am running a 2 bulb fixture over my FOWLR 120 tank. it's ok, but I want to start getting into corals.
I have been looking at 2 different fixtures. Both 6 bulb. One is the ATI Sun Power cause I'm not made of money and I understand ATI is a good fixture. The other is the Sun Supply TEK Elite.
Which would you get? the TEK is $100 cheaper then the ATI.
What are the differences between the 2? They both seem to have the same features.
I need some help!!!
Thanks

 

[Spotted]

Or could I get away with a 4 bulb fixture. My tank dimensions are 48 long by 24 deep by 25 high.
Thanks.

 

[spoonman]

If you eventually want to get into some of the harder corals I would go with the 6 bulb. If the wattage is the same, I would get the cheapest one. Later on, you can upgrade bulbs to ATI....etc.

 

[mr_X]

I would go with an 8 lamp fixture if I was doing a 120 reef. The Tek fixtures are fine. You could use a hydroponics fixture for a lot less.
Here's one that's pretty cheap. I used a similar fixture over my tanks for a while, only My reflectors were smooth, not hammertone. It's hanging in my garage now, since I got my LEDs...which is another option.
8 Lamps 4Ft T5 HO Fluorescent Grow Light 48" Bloom Veg Bulb 95% German Reflector | eBay
here's another that's super cheap....
C.A.P. MaxLume T5 High Output Fluorescent Fixtures - Discount Hydroponics
http://www.ebay.com/itm/8-Lamps-4Ft...A%2BFICS%2BUFI&otn=21&pmod=290695215481&ps=54