Between the three, I'd let price point and availability be the guiding factor. Delvac, Delo and Rotella are all that good. The minute differences in chemistry might likely skew a used oil analysis after changing brands, but as far as protection goes, they're all top performers.
The red-headed step-child award goes to Tection Extra (Castrol). You rarely ever see or hear of it. I found a smokin' deal on some last year; 3 gallons for $24. I personally have had good experiences with it.
And if you want to talk about the white whale of diesel oils, I just saw that Coastal now has its CJ-4 forumation out, and it was priced at $7.74/gallon at my local AAP! I percieve that many people shy away from Coastal, as they consider it to be inferior, but I don't know that's a fair shadow to cast. I don't even recall seeing a Coastal HDEO used oil analysis.