Sorry dA didn't notify me of your second comment
Wacom Intuos4 Large tablet (expensive I know, but well worth it
) and I'm currently using the Beta of Photoshop CS6. It's cool cause it's fully featured and free with no time limits! (Well until it's released that is)
But if you are looking for something cheaper I recommend one of the Wacom Bamboo Tablets and Photoshop elements.
Hope that helped