Logitech FabricSkin Keyboard Folio $149.99
Launched this month, this Logitech cover, designed to mimic a Moleskine notebook is a descreet protective cover which embeds a full-sized keyboard into the folio's fabric. When opened up, onlookers could be forgiven for thinking that you're using a Surface Pro, rather than an iPad.
This case offers three different viewing angles when using the keyboard, holding the iPad in place via hidden magnets.The magnets also activate the keyboard's Bluetooth connection so that it only draws power when the case is opend up and the tablet is in use. Order it in white instead of black and the case has aluminium front and rear reinforcements. http://www.belkin.com/us/F5L149/p/P-F5L149
A combination keyboard, cover and case, the ZAGG pairs premium-quality faux leather with an excellent backlit keyboard. Users can choose from three brightness levels for typing in different conditions and from a range of seven different backlight colors http://www.zagg.com/keyboard-cases/index.php#zaggkeys-profolio-plus+ipad-3
ClamCase has been around almost as long as the iPad itself and as such it is one of the most popular. The Pro model essentially turns the iPad into a clamshell notebook. Alternatively, it can be folded inversely so that the keyboard sits behind the device so that it can be used in handheld tablet mode. http://clamcase.com/
Taking the idea of the ClamCase one step further, the Bryde actually clamps to the iPad so that to all intents and purposes it is a notebook. It even has built-in Bluetooth speakers for listening to music while typing. Available in a number of finishes, the anodized aluminium Brydge + at $199.99 is the pick of the bunch.