Ohh I loved the Wacom Bamboo, it was my first tablet and worked well<3. I had it for about 4 years before it was impossible to draw on it ;;.
I replaced it with this:
http://www.amazon.com/Huion-Express...&ie=UTF8&qid=1402103325&sr=1-2&keywords=huion
If you have an extra 5 dollars and 97 cents in your budget then this is another great option~! I saw posts about it on Tumblr and decided to look into this rising brand myself. I read a lot of reviews and looked at the questions people asked and also at the answers the company gave..and I decided to take the leap of faith and buy it! I gotta say, I'm in love with this thing. I mean, it's like the Bamboo but a bit better in my opinion. I don't think it has the 'Touch' feature the Bamboo had but since you're mainly going to be using your tablet for drawing, that doesn't matter much~!
I love how my lines don't have flicks at the end like they usually would when I would draw on my Bamboo and this tablet has more pressure sensitivity too-- it's also a bit bigger too but not over-overwhelmingly bigger. It has keys on the side that you can assign to do specific things. The only thing I was slightly annoyed with in the beginning was the fact that the pen needs TripleAAA batteries to work but it's not that big of a deal. Plus it lasts for a long time even though I accidentally leave the pen on sometimes LOL.
I also love the grip I can get on this pen too- aaa.
I can't comment on the Bamboo Capture since, while I've known about the tablet, I don't feel right talking about it since I don't have personal experience with it XD. But I have heard from some of my artist friends that it's a pretty good first step beginners tablet so go for it if you want it~! ;u;
Take your time when searching for a tablet and look up as many reviews as you can ;v;/~!
OH and it might take a while for you to adjust to drawing on a tablet since you're going to be looking at the screen while drawing instead of down at your hands. So for practice, just draw shapes like circles and squares and what not and just try to get yourself coordinated XD. It might be frustrating in the beginning but don't give up~!
And if you want to know more things about SAI then I can link you to some good resources for that, too ;v;