I use a Wacom Intuos3 9" x 12" tablet and I haven't had any problems out of it yet. I think it was between $400-600 but I'm not sure. I got it for a gift. Any of the Wacom tablets are worth buying though. I know a lot of people who have a Bamboo fun and say those work pretty well and they're cheaper.
I would recommend getting the largest size you can for your money. ^^ The more space you have to draw on, the better, in my opinion.
Thank you SO SO SO much!!!I have been looking for one for a while and you were the first person i asked and you helped me so much!!!!And one last question do you see the picture on the tablet when you draw like it is paper or do you have to look at the screen to draw??
With mine, I have to look at my computer screen while drawing on the tablet. It takes a little getting used to for sure, but it's not as tough as it sounds. xD There are some models though that do have a built in screen but they're pretty expensive.