I believe the Samsung Series 7 Slate Tablet makes the very best that Wacom has to offer obsolete. Buy the Samsung Series 7 Slate with stylus and touchscreen support for about $1200. You're getting a modern tablet PC along with your drawing surface, all rolled into one. Or you could buy the Cintiq for over 2 thousand and have only a drawing surface which still needs a computer to operate. Later this year with Windows 8 will come devices that will be even better than the Samsung device. I have a Wacom medium size pad now. It is a seriously high quality product, but drawing on that while looking at a computer screen is an entirely different experience than drawing directly on the tablet PC (I have an HP TouchSmart TM2) and using my fingers to zoom and pan and access interface elements in whatever program I'm using.
When Windows 8 comes out we will see tablets probably as thin as an ipad but with full Windows OS, stylus, and detachable keyboard. The best of all worlds. Drawing surface, powerful computer, laptop, and slate for portability. These will be the best devices ever made for graphic artists.