Hard drive replacement late 2011

Hi all. I need some advice on what to purchase. I've traded my brother an 09 imac for his late 11 macbook pro. Plus a little money to boot I might add. As I was getting a new iMac it was a good trade for me. I want to upgrade the hard drive seeing it is the smallest that apple put out at the time. I would like to go to a ssd for the speed but do not know if it is worth the money or just do a Hybrid. If the hybrid will give me the same speed then thats fine. How to I install all the apps on the ssd side of the hybrid but yet the content on the other? I'm confused by all of this and if anyone has a link to a good discussion about this or some advice it would be much appreciated. I need something of course that is compatible with this model. It is the last one that they made that is upgradeable I believe. Any links or suggestions would be greatly appreciated.

Thanks