Im in the machining process with my 512 build. With the same criteria your buddy wants. I had the same conversation with Dwayne also about hyd rollers. After a couple talks with him about the cars intent and some pros and cons on cams. I ended having him spec me a solid ft. I will be using HYLift Johnson lightweight EDM lifters. They weighed 80 grams compared to the Comp 901 EDM at 100 grams. I may switch out the Trick Flow head springs for beehives. This should make for a pretty light valve train. Other than the TF valves being kinda heavy. If I were to do a hyd roller. I would use the HYLift Johnson slow bleed hyd roller lifter. But that's just me. But like you. I read around and found the same answers about hyd rollers. Which was. Some really liked a hyd roller and some not so much. I probably could have used one because this engine is 99% street. I just felt after Dwayne and I talked. The solid ft was the best choice and fit for my build and it's intent.