I think we're over-applying the ability of any lube to control against the OPs concern here, at least to a major degree. The concern is essentially how to keep the valves clean. DI engines suffer from a lack of fuel wash on the backside of the intake valves, as we all know. So the PCV vapors coat the back of the intakes. While I do believe that perhaps a lube with a very good Noack score MIGHT help to a small degree, the reality is that just about any DI engine is going to suffer a significant amount of build-up, regardless of what brand/grade lube is used. And, Noack only addresses vapor of the lube, and speaks nothing to the soot and other byproducts which also contribute to intake valve build-up. He's asking for advice on the "best" oil to help with this issue. I think there are far more important topics to mechanical intervention which supercede lube choice in this topic.
There are certainly some improvements in API classifications and other Euro certifications regarding lubes for these DI applications; that's very true. But it's a matter of what kind of improvement can be found versus the overall aspect of the DI process. If keeping the valve goop from building up is a major concern, then rerouting the PCV vapors (externally, or via a catch-can) is about the only way to resolve this with a much higher degree of confidence over brand/grade of oil chosen. I'll make some examples here for clarity, though I have no proof that these values are accurate; this is for illumination of concept and not claim of fact. If one of the new, super premium lubes is capable of reducing vapor-born intake valve build-up by 3% over the life of the engine, that pales drastically in comparison to the 85% improvement (or better) of using a catch can and monitoring it properly, or if one is willing to risk the heresy of being scofflaw, the 100% effective act of dumping them to atmosphere rather than back into the intake. I am not advocating for any one choice here; just trying to put the task in context. IMO which lube is chosen is really going to have a minimal impact on the overall effect. The choice of lube might alter the time frame of when the engine may require an intake valve cleaning by maybe 20%??? IOW - using a lower quality lube might cause you to have to have the intake valves cleaned at 100k miles, versus using a high quality lube might mean you need them cleaned at 120k miles? Because the OP said he intends to "drive it until the wheels fall off", it's not a question of avoiding the valve cleaning; it will be needed at some point. He can only defer the cleaning, not eliminate it. Versus, using a catch-can which quite possibly might avoid the cleaning all together, or at least double or triple the valve cleaning interval.
My point? The act of altering the vapors path via mechanical intervention is FAR, FAR more effective at keeping the intake valves clean than what lube you're going to use.
That's my two cents anyway.