The Legacy Dynon system with the bright screen option has absolutely no issue with Sun light. The Skyview is even better.
My vote for Sunlight readability 1-10 with 10 being best (based on what I have actually seen):
iPad = 1-2 better if you hold it to find sweet spot
Aera = 3 depending on angle
296/396/496 = 5-6 depending on angle
Legacy Dynon bright screen = 8
TT Gemini PFD = 8, straight on, off axis fades quickly
430W = 8
Garmin 796 = 8
AFS 2500 EMS = 9
Skyview = 9
Garmin GTN series panel mount GPS's = Gold Standard 10+