What good drawing tablet huh? Check the specs first: Pen Pressure Active area ASPECT RATIO (is your monitor a 4:3 or 16:9 or any other) Resolution Other perks Then if you have high enough specs, you should buy that tablet. The Wacom Intuos brand is a very good one, though it's costly. While the Wacom Bamboo is less expensive, it, too is a logical choice.
........ Though I don't have any of the above Wacom products :/ but you should have. if you're planning to buy one.
I wouldn't really recommend Genius. I've had two friends who have had Genius tablets, and they've both complained heaps about them. XD Yes, the size and cost might seem appealing, but the products don't seem like they're very good quality.
Wacom is much, much better. The Bamboo series is a nice start, but if you want a larger tablet then you can opt for the Intuos line. Intuos5 is the latest, but Intuos3 and Intuos4 will work well too. (I personally have a Bamboo Pen & Touch - been using it for almost exactly two years without any issues.)
Also, if you want to reply directly to someone, then hit the Reply button under their avatar rather than adding a comment at the bottom of the page. =]
Two tips: Aim for something that has same aspect ratio than your monitor (that's an absolute must). Aim for tablet that is about the size of display or A4 paper. (Those two things are practically about the same size at me).
Get a Wacom Bamboo Connect. It lacks many of those good-for-nothing features such as an eraser ( I'd rather press E than turn the pen around ) and extra buttons (which can be replaced with keyboard shortcuts ) and is capable of quite some amazing feats. (I.E accuracy, pressure levels ). If you want to pay extra to have some press-able squares on your tablet, go for a pricier model.
P.S: I really do not care about the software bundles that come with the tablet as I had no use for them, but if you think you might need those, do some research before buying the tablet. The more expensive ones obviously come packed with better software.