I fear that I lack Mr. Felser's unfailing good judgement. I too own and really like those Freddie Hubbard Blue Note and Impulse! records, and doubt that collating them and adding an essay will affect my enjoyment and understanding of them. The "improved sound" and "all in one place" arguments are not as convincing as they were before I purchased the more recent Hank Mobley box or Joe Henderson sets. Strangely, I will, in all likelihood, purchase this collection.