Question about Mercury Racing motors?

[Wizard 29]

So wait, the 520 to 525 step is $15K? $3K per pony sounds a tad bit high...

I really don't know all the details but I have been told that the 520 will cost quite a bit more to rig as it is "Fly by wire" and the cost differential is much closer when this is taken into account.....anyone know what those numbers are??

I was a Nordic today and that's the prices I was told. As for rigging if you choose the tds it is about $3000 more.