So What is Better?

from what I read the new electronic ballasts are more efficient and are better for long bulb life.

I am thinking on getting a Lumatek 400w Digital Ballast to fire up a Mh and HPS(no not at the same time). But if I hear that the old magnetics are better then I wont go digital.

Help me out folks this old dog is tryin a new hobby. and I want to do it right.