@Shane > No, the CDJ-850s do not utilise Quantize. Yes, you will need to save the cue points as Memory points. Calling them up is relatively easy but they do not function as hot cues - they function as memory points.
Certainly, if you do update your players at a later stage or if you will be playing gigs on the higher end equipment you'll be well prepared so adjusting doing all the track preparation in rekordbox certainly isn't a waste of time.