Actually, I've just had a shufty at DT Swiss' website, and it seems that the 415s are single eyelet (which explains their low weight). This is hard to explain in a short time so do a bit of googling. There used to be failures on DT single eyelet rims, but I have a feeling that's been addressed. Speak to Parker about this. It might be even worth getting what some would consider a more 'boring' set of Open Pros (in reality, I rarely see people riding them these days possibly for that reason - so, perversely, you could consider them to be quite different, if that's your thing!). Slightly heavier at 430g, but double eyelet. Also £40 cheaper for the set!
Shame you're not on Campag mind! You could get a set of Open Pro on Record for £320 which is what I've had for 12 years. I've done everything on them; Race, tour and sportives, and they're still my daily drivers because of their comfort and smoothness.