I’ve got a few hours in the SR20. I think it’s quite good for e.g. cross-country VFR (120 KIAS cruise speed, good autopilot etc.) and instrument training in VMC or IMC outside of icing conditions. The Avidyne and Garmin gear can be useful for teaching e.g. CPL(A) students some systems management. General EFIS familiarization also comes to mind, although it might cause an issue with some pilots (both students and licensed) who fixate too much on the screens during VFR flying.