There is much confusion and misconception about photography in this day and age. What makes a photographer, his talent or his tools? The answer, though obvious, is still one that we battle with. I was there at one point, for other reasons, but I was there. I saw the work of an amazing photographer, and thought, I want my photos to look like that. I can't help but laugh in remembrance when people tell me the same thing now, but that's the problem. I wasn't that photographer, and these inquirers aren't me. I got my dream camera, but that didn't put me at that level. It's the same skill, using improved tools. This post isn't to offend or prevent someone from pursuing their dream camera, just to share what I know and answer some frequently asked questions.
I started on a Canon Rebel T3, I developed my style on it, even booked clients with it. The reason I wanted to make the large leap to a Mark II, was that I planned on a professional career, and wanted to be able to provide professional quality and stay competitive. The camera is obviously higher quality, a full frame, and easier to manipulate in manual mode. Before upgrading, really get to know your camera and it's features. Many tell me they want my camera because of it's bokeh/blur, but that is dependent on me and the lens. A good quality camera will get plenty of bokeh, with a lens of low aperture. I got this picture on my Rebel with a 50mm 1.8 :
The point is not in improving your equipment, but how much you should improve it. If I wanted to go the hobby, blogging route, an upgrade to a Canon 60D would have sufficed, in fact, many bloggers I follow use it, and it produces amazing pictures. Whether you decide to go the professional or hobby route, research! I knew nothing when I started and didn't have anyone to ask questions, and it's helped me develop my own style and technique. So many people lose unnecessary amounts of money, because they don't do their research and think a certain camera holds all of the secrets of a photographer, and are sadly disappointed. It's always great to upgrade, and exciting, just make sure you keep some things in mind:
Where do you want your photography to go? Good pictures of your kids? Hobbyist? Blogger? Professional? Weigh the importance of the quality and price based on your chosen path.
Shoot in manual. If you decide to upgrade to a more expensive body because you want bokeh and better effects, you will never get them if you don't shoot in manual. Experiment or research online. You will be happy you did.
Make upgrading a good experience. The less you know about cameras and how they work, the more of a headache you will get when you're staring at that fancy new screen with endless possibilities. I cannot stress enough how important experimenting and research is so you can shoot in manual.
I hope this helps a bit, in at least giving some insight into making an investment. Happy upgrading!