Seldenr, after extensive critical listening to the playlist of my vinyl, I've come to the conclusion that any shortcomings are in the original analog domain.
Although I have a large vinyl collection which was the result of natural accumulation before CD, I wasn't into high end audio. Once I got into high end, my analog lagged behind. I've discovered that with my humble A to D conversion rig, the shortcomings are in the analog domain as opposed to the digital. You won't have that problem.
In regard to the "pop removal", mine works very well; but I only use it on records that need it. I would think going directly into the Benchmark will yield the best results. I'm using Windows 7, if non-defeatable volume control is eating bits, it hasn't eaten so many that I can tell the difference.
Your post was highly beneficial, and I'm sure you will get the best results.