I'll second this. I've found that for video work, vintage glass is just as sharp and sometimes even sharper than modern day lenses as long as you get the right models. I've had plenty of Pentax K glass, Pentax M42, as well as an Olympus Zuiko 50mm 1.4 and they have all blown me away.
Like said above I would also strongly suggest getting a Tascam DR-60dmkII. The audio amps are much much better than the H4N's and the interface is much more functional but more importantly lags less and runs a lot faster.
The camera is going to be waaaayyy cheaper than the film itself plus the processing and getting it scanned at a high res. Film is fun, but it just turns into a stressful mess if you don't have the budget for everything needed.
A better CPU will always benefit over a better GPU. The extra 2gb of memory honestly wont be noticeable. Go for the i7 processor.
looks pretty cool and similar to adobe story. I'll have to check it out.
A t4i is more than plenty for anything you need. If you want to improve the quality of your films I would suggest saving the money and learning about lighting, audio and color as these are key to a good film. If your school doesn't have lighting and audio equipment, I would suggest spending your money on just that because there's no purpose of buying a really nice and expensive camera if you're not going to be able to have access to some of this other equipment.