Where to buy Microsoft Surface Pro tablet?

I want to purchase a tablet with Windows 8 Pro with stylus, Core i3 and above, detachable keyboard..

Here is a list..
List of Windows 8 and RT tablets and convertibles with stylus

I am leaning towards Microsoft Surface pro but the availability etc problesm are there..

Do you guys know which tablets from the above are available in india (in north india or online)