I have used every major option from wacom extensively and here is my opinion:
The lowest tier Wacom tablets (Intuos, bamboo, etc) are for students that kind of like drawing and feels as if digital might be interesting, with no intent of actually studying and getting good, this is just something they used to enjoy as a kid and now in a digital format.
Wacom Intuos pro Medium is for the person that really enjoys drawing. At this point you have probably been drawing in photoshop or equivalent software with a mouse for a few weeks and wish to stop the torture. You may not want to do this for a living but at this point you feel like you want to be doing this for a long time and the investment will be worth it.
A cintiq, you're now determined to become a proffesional and is willing to spend huge amount of money on this tool because you know you will earn it back. Not for the hooby artist with a low income.
Buy the Intuos pro medium, you won't regret it. It is a bit pricier compared to the lower tier but you will not regret it, it was my first tablet when I was in your exact situation. It is worth it if you want to be drawing and is considering the option of actually getting very good. In my opinion the lower tier does no suffice.