I would have thought that 3100s (which apparently are tonally very similar to the 5200s) would be more than adequate as rears unless you are planning a lot of 5.1 discrete listening (i.e. DVD-A), though even then I would have thought that the front 5200s could still cope easily with the redirected bass. You'll also have an additional �3.5k in change...

Regarding subs, I believe the new generation of M subs are a substantial improvement over the previous (1500 and 2500) models.

Roon Developer and ex-moderator of this Forum
I am #25 in the HH1 photo of fame.