LowNSlow, your self description would be quite accurate for me too! No problem in a Luton LA4, nor Jodel D9. I think 100mph would be optimistic in any VW (correct me if I'm wrong!). I seem to remember FRED at 60kt ish. Ditto Luton. Jodel/Turb can cruise at 80kt, but at quite a cost in fuel (up to 10 litres per hour!)
Good luck with the choice!