ballast and fixture pairing - TCMAS

So this will be my first metal halide and I was just wondering if I could pair the bottom ballast and fixture together?

Aqua Medic Metal Halide + T5 Ocean Light Fixture,

http://www.marinedepot.com/Aqua_Medi...19711--vi.html

I'm interested in this 24'' 150W AquaMedic fixture with the two T5's and the ballast option they gave was the 150W Reeflex ballast which runs 129.99. For a little more I can get the Lumatek 250W Dimmable (I'm under the assumption that it can run 150, 175, and 250 watt fixtures from the description). Would the Lumatek ballast work with the AquaMedic fixture? Also is this plug and play or would I have to splice anything? I'm new to this and would like avoiding splicing, any help would be great, thanks!