After doing some more digging, I think that although it may be factory rated at 450NM it can be made to handle much more and still cost much less than a G50.
Here is one discussion on this site:
01E how much HP?
Looks like this Steve guy they mention reworks the internals. I will probably just go with one of his with an LSD option then instead of buying a used one that probably won't handle the power.