Camera and lenses for an amateur photographer?

Should I buy a higher quality camera or a higher quality lens? If I buy a lower quality camera and a high quality lens they would be the Nikon D3100 with the AF-S 50mm f1.4. If I buy a higher quality (and more expensive) camera it would be the Nikon D5100 with the 50mm f1.8. I really want to photograph bokeh and have a good focus in the photos. I'm also interested in shooting video. Do the 50mm lenses work well with videos? Any other suggestions or opinions would be very helpful! I was thinking about a Canon T3 or T3i with 50mm lenses as well.

Nikon D3100 with the AF-S 50mm f1.4