What connected with wood is going to be used for your doors: You'll need a solid wood and you'll be able to pick many species from Oak, Rift Oak, Quartersawn Oak, Cherry, Walnut, Mahogany, Ash, Birch, Hickory, among others. If RTA cabinets are picking a "Shaker Style" Door then Cabinet Makers often use Veneered center panels which is okay but better yet is a reversed raised panel door(a