I agree with you all that Darkhorse or Revolution is the way to go. And my dealer will allow me to do anything I want with the situation, (as long as I pay the difference for the upgrades~which I think is more than fair) SE crank / SE crank w/ mods, stock crank, stock crank w/ mods, S&S crank, Darkhorse crank etc... and they would warranty that work out of their dealership, out of their pocket, if they do the install.
Here is where the big "but" comes into play... I travel a good bit, If I am on the road and have a problem and have to go to a "foreign dealer" and the ESP rep or a "foreign dealer" sees a welded / aftermarket crank, than I am SOL and have to eat it. Whereas ESP will replace stock cranks 'till the cows come home... . Going after market is just not in MY "risk / reward" scenario on this bike. If the crank fails again, as soon as the original did, (<10k) then I might rethink my strategy.
A good friend of mine that has been averaging 30k+ miles/year since '06 had the rod bearings go out in his Skunk at 16k, he is going the Darkhorse, Carrillo, Lefty, Timken, Fueling, 113 etc... route and I'm sure that it will be bada$$ as his two previous bikes were. It's just not in MY scenario.
As noted previously, there is 4.5 years of ESP remaining on the '09 SERG.