Not to jab the hornet's nest, but in what way does the DTR perform worse than stock? I don't have a lot of knowledge about them, but it seemed like the DTR was a fairly attractive option.
Just my opinion, but the DTR is still a fairly attractive option on a stock or stage 1 GTI, considering it's a turbo and tune for $1500.
On a stage 1 R where you already have an IS38, it seems like it kinda looses it's luster, especially considering you need the $2700 version with the fueling upgrades to really take use of it.
Rice can probably articulate it better than me though, since he actually lived it, while I'm just going off what I've read.