Solid lifter on hydraulic cam?

I`ve had some floating valve issues and would like to get the full potential out of my engine, so after talking to a LOT of different people in the field about hydraulic, anti-pump up, and solid lifters, I came across the tech at Comp that suggested the swap. I already have adjustable roller rockers and a set of solid pushrods. If the swap was feasible I could simply pull the rocker shafts and pull the lifters through the heads without even removing the intake. An $89.00 endeavor, and retain my present cam. The tech at Comp did say that the cam would NOT perform as well, and I would lose .004-.007 off the cam grind because of lash, not to mention the different characteristics of the cam lobe slope. I considered it based on cost and that my present grind was not available in solid. In summary, I called Comp back and they are going to do a custom grind for me and my $89.00 project is now at $435.00 with custom grind cam, lifters, gaskets, timing chain, retainers, and locks. If I would have gotten any favorable feedback on this question I may have given it a go, but I`m going to just spend the money now and be done with it.