If the issue is tin Piper versus wooden Robin why don't you get a tin Robin!. I flew a Robin 3000 for the first time yesterday and was very impressed. It's different, which helps the posing factor if that's important, and doesn't lose out a great deal to the DR 400 on speed or payload.
It's a genuine 4-seater and has typical Robin visibilty.There's one for sale on Just Plane Trading BTW.