I use a PC Desktop, but also have ASUS TF101 Tablet which I find excellent. Size as per Netbook Includes detectable keyboard & 2 USB ports. Keyboard contain Battery & Tablet also has battery, together gives upto 16 hrs usage.
I like the Android OS as it works fast and slick with thousands of free applications (programs).

I considered the iPad but the additions like USB & HDMI outputs are very costly.