If you are a professional illustrator, you should get it. If not must. At $2500 it will pay for itself in just a few jobs. Also, if you are looking for a new machine and monitor, you can avoid buying the monitor and get the Wacom Cintiq 24HD. Heck, and I'm not a professional illustrator and I'm thinking about getting this and a Mac Pro to replace my aging iMac 24.
Forget the Inkling.
There's video of it in action at the link.
No more need for a drafting table to lodge it in.
There's even room on the side to secure a speedpad to it.