I had XT and XTR everything back in the late 90's. Something just felt super solid about the older equipment. It rarely needed adjusting and could take just about anything I threw at it.

I see used 9 speed XTR RD-M952s for sale. Should I consider getting one or are the new derailleurs (lesser models) built much better? Are used mechs something to avoid or is good ole' vintage more durable?