Recently got the new wacom intuos photo version tablet,around 58 uk pounds .found it a fantastic bit of kit and a lot of bang for your buck.
Very precise,customisable controls .and very intuitive .i will never use a mouse for editing again.my son has the intuos pro and personally i find the cheaper version more than capable .

http://www.wacom.com/en-gb/products/pen-tablets/intuos-photo

Ive recently got the intuos photo edition tablet ,its a fantastic bit of equipment and costs a lot less than the pro version.cost me 58 uk pounds
I thought i would risk that and see if i could use a tablet rather than risk £200+ and find i didnt like it. Best £58 ive spent ,very precise controls,totaly user friendly and the controls are adjustable to suit your needs
http://www.wacom.com/en-gb/products/pen-tablets/intuos-photo