My iPad makes the daily trip to and from the office and so a case is mandatory. For screen protection and business-like appearance, I prefer folio-style leather cases. Sena's Florence (Magnetic Closure) folio case 
$80 is my current iPad 2/3/4 case. It's pictured at left with my Griffin Stylus $10 securely clipped to the folio spine, & my matching Sena Sarach Leatherskin iPhone case $40.