I'm going to get a new (used) laptop soon. Which Debian release should I install at this stage of the release cycle, Jessie or Stretch? My current laptop runs Wheezy.

(I want as few bugs as possible, but also dislike the idea of having to upgrade in the near future.)

Also, is Xfce still the lightweight desktop of choice?

@stefanieschulte You might also check out Mate as a DE; it's similar in weight to XFCE but built on more modern libraries (GTK3, which XCFE is moving to shortly). Well built and maintained.
@khoshekh If Mate is as lightweight as Xfce, it might really be an option (considering the age of my hardware, this is a serious concern for me).
@stefanieschulte I've found it to be but YMMV. Worth checking out if you have some cycles to test in any event.