What things are you hearing need to be worked out?
I've got a pretty good amount of hours on the SD and S series, neither have let me down, but there is a number of people that feel the S Series interface is inferior to SD and other console brands. I personally don't mind the interface.
The new A&H Avantis is worth looking at as well.
I would concur. One or two S21/31s, lots of SD, CL and still a good amount of Venue coming through.Of the bus & trailer acts that carry consoles I've seen only 1 act this year that had S31. The others have been Yammy QL/CL, M/X32, DiGi D10/12, and a couple of Allen-Heath dLive.