Looking for midrange mirrorless camera for photos and regular high def video for lectures/educational content on website. I think I want larger sensor, microphone headphone jack, wireless capability , stabilization and sealed. Oft. Have considered Sony 6300, lumix G4 and Fuji line. This would be new territory for me so simplicity/ ease of use a factor and G4 probably absolute top in cost department ( less would be great). Any suggestions?