I've purchased most all of the RVGs that have been issued by Blue Note. This is due, in most cases, to the fact that I don't already own these titles. And, the RVGs are better than the 1980s McMaster re-issues.
In many cases, however, I don't believe Van Gelder is 'the best' at the art of remastering. Yes, I know many of these recordings were recorded, initially, by Rudy Van Gelder. However, I don't believe that Van Gelder is ALWAYS the best at the art of remastering in the modern day. Ron McMaster is better sometimes.
In regard to Fantasy/Concord, I have no desire to purchase RVGs of titles that have already been made available in the K2 format. I believe the K2s are VERY good and, most of the time, better than the RVGs issued by Blue Note.
Please, leave the RVGs to Blue Note. It's been a terrific series. However, I prefer to purchase Fantasy reissues that have been remastered by Tamaki Beck and Shigeo Miyamoto.