upgrade from 48'' 4x65w pc to 6 48'' aquaticlife T5?

I currently have a 48" 4x 65 watt current usa fixture on my 90 gallon reef tank. Is a 6 bulb t5 setup by aquaticlife really much better or is it only a minuscule difference? I would like to have all kinds of corals except for the super hard corals. I am not really willing to spend more than 500. Supposedly there is also a 48 inch 8 bulb fixture...havent found it yet though...overkill?
AquaticLife T5 HO 6-Lamp Light Fixture w/ Lunar LEDs

 

this one is $460
Current USA Nova Extreme T5 Aquarium Lighting Fixture, 8X54 Watt, 48 inch

 

why not get metal halides?

 

I think you will find a significant increase in light. This will help with LPS but I would think the 8 bulb or MH would be needed for Clams, Anemones or SPS corals

J

 

6 or 8 bulb t5 with individual reflectors will be a nice step up from your pc lighting.. you can have anything u want with those. how deep is your tank?

 

yeah metal halides are out of the question...too much heat = chiller. Also, the electric bill......my tank is 2 feet deep. Also, the current usa fixture does not have individual reflectors..the aquaticlife does. The 8 bulb probably wont fit over my tank. its an awkward wave front so part of it is 2 feet the other part is a foot and a half. I have a picture of it up

 

The 6 bulb will work fine just put the higher light needing critters up higher in the tank. Buy top of the line bulbs to replace the ones that ship with the unit.