Need MC Step-Up Transformer advice?

I'm thinking of a different approach dealing with my low output Benz MC Cartridge.
What is the feeling and opinion in this forum about Step-Up transformers .vs. active amplification.

Right now I'm using a Audible Illusions M3A (With Gold Phono boards), Levinson Amp and Quads.
I will probably be changing preamps soon - not sure to what.

Anyone have experience with multiple transformers that can guide me towards some and away from others?

Thanks, Steve