which is best digitiger,

[prabidhi]

could some one tell me that which degitizeris best in qaulity and have very reliable function and also the which brand is most used and the fuctions and what should i note to buy one of them
like its function
i am null at the information of digitizer so help me to select good degitizer
to work on cad.
i want to buy good degitizer. function is more important to me than money and so i want standard digitizer or tablet which would be cheap either but you can suggest the branded also for my information.
here r some links but i also dont know which can be used for autocad.
tell me some features i should consider too.
the links may be of tablets or digitizer but i am not sure

http://cgi.ebay.com/USB-Mini-Graphics-Tablet-Pen-NEW-PC-and-MAC_W0QQitemZ250049875449QQihZ015QQcategoryZ80046QQrdZ1QQcmdZViewItem

http://cgi.ebay.com/AQUILA-L1-DRAWING-GRAPHICS-TABLET-CORDLESS-STYLUS-PEN_W0QQitemZ250050658769QQihZ015QQcategoryZ3680QQrdZ1QQcmdZViewItem


http://cgi.ebay.com/Nisis-G3-USB-Graphics-Tablet-6-Cordless-Mouse-Pen_W0QQitemZ260054844250QQihZ016QQcategoryZ39980QQrdZ1QQcmdZViewItem

http://cgi.ebay.com/WACOM-INTUOS-9x12-Graphic-Tablet-Video_W0QQitemZ200048086645QQihZ010QQcategoryZ3680QQrdZ1QQcmdZViewItem