Seems like I'm the only person that went with a Stage 1.
(Dorch - $999 at release)
Flows more than XDI-35, and I figure there's no way I can keep the car cool enough on hot open track days if I go bigger turbo, Stage 2 HPFP, and start pushing major power.
The plan is to max out the Dinan turbo on E45, which I'm guessing will be 450whp? Should still keep some good drivability around town, too, with reduced lag.
It's all going on in a couple weeks, so we'll see!