Running higher levels of boost is enough of a reason to upgrade the PCV. An EQT Vortex on 32psi sucks a LOT of oil through the stock PCV during aggressive daily driving (ask me how I know
).
FCPEuro stopped recommending the S3 PCV "upgrade" because, despite the initial reports being positive, users were still having issues with it. After I picked up my RS3, I de-tuned the Golf R to 30psi and installed the 06K103495BL PCV and have not had any issues with oil during aggressive daily driving (only the normal misting in the turbo inlet). I don't know why I went with the
BL version over the
BM one, but it's holding up well.
ETA: I wouldn't bother wasting money on the ECS "upgraded" breather hose. If you're okay with spending $250, why not just up the budget by $50 and buy a used Spulen/etc system?