Which Lyra Helicon?

I'm getting into vinyl in a big way, just purchased extended Aries w/JMW 12.5 tonearm.... now, I need a cartridge and phono pre-amp.

I've pretty much decided on a Lyra Helikon, but unsure about whether to get the .4mv or the super low output one (2.3mv?)

What should I do?

For now, budget says Grado Phono pre-amp.... or? suggestions?

Thanks, in advance.

John