I own the Genius F610 which I got for $70, it is big and works great under Windows, it seems to share a lot of the same specs as the one in this article.... I managed to get it to work under certain linux distro's but it wasn't easy nor did it work well with only certain applications actually.
What I liked about the driver software was how well it works with dual screen and gives you the ability to select which screen the tablet should work for, if not both. I don't have the software or tablet with me but I also want to say it also gives you the ability to create screen margins so that you can fine tune the area you want to draw in but I might be wrong. These really are great bang for your buck.