I can't be of a whole lotta help because I don't have any experience with the Art gear, but I do have a Dbx 160a. I've found it works well in SOME cases with my Sm7b for rap vocals, and I know it has been used in this capacity before in high-level professional studios. Definitely hit or miss though, partially because it has no dedicated attack/release controls. It does have a hard/soft knee adjust though so that might help. I would think if the VLA's do have the above controls they would work better for a larger variety of circumstances.