So what do I win?

Kidding...
I think the Lundahl-modded mic might benefit from better preamps and converters as well. At that point you might start more out of the mic. I've got an oktava ml52 that has the lundahl mod, and it's got a lot more depth and detail after the mod. I've got 3 other ribbons (2 from the tape-op group buy, 1 a sample from a chinese factory equivalent to the smaller shiny box model), and those aren't modded except for removing one of the interior screens.
If you're living on the low end though, the difference probably isn't worth it. I'd spend the money on better preamps first.