I want a laptop but don't know what kind to get?

I'm willing to spend up to 900$ and possibly a little higher if it's a good laptop! I'm going to need it for school to write papers and spark notes! I need it to have a camera! Be able to download iTunes and Java and possibly have a Touchscreen. Any suggestions?

If with a touchscreen then go with Lenovo yoga 900, its a tablet and a computer but if without the touch screen go with Mac Pro Retina, Top of the line right now.