Metal Halide: HQI versus Mogul, Elcetronic versus Core & Coil

I have a 120 gallon tank (48 x 24 x24) that I am planning on upgrading the
lighting from PC (4x96) to some type of metal halide. I want to add SPS to
the mix and feel the upgraded lighting is necessary.

That being said, I am looking for some advice on what type of halide
lighting to use for the tank. My wife has one criteria, whatever ballast I
use has to be quiet. This tank is in our family room in the basement.

I've asked around some online shops, and I am getting good, though mixed
advice. One shop recommends mogul based bulbs and electronic ballasts(Blue
Line pendant with e-ballast), another PFO with core and coil and a third
Reef Optix 3 with its ballast.

I am asking the group what they would recommend and why they would use the
equipment recommended. Does the group see any difference between Mogul and
HQI (double ended) bulbs? Does the answer change if an electronic ballast
is used versus core and coil? Which type of ballast is "better" and why?

I am a new to halide lighting and am looking for a little advice and
education.

Thanks in advance for any and all help!

John