mmariee Said:
”[...]I was planning on using it mostly for school-work as well as editing videos. Occasionally I may play games like Sims, but that happens perhaps once a year.[...]”
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It’s All Based on Multitasking:
i3 is Dual Core, whereas i5 & i7 are Quad Core.
Quad Core is Great for Multitasking:
Multitasking is running many things (i.e. many apps at once). So, i7 is what would suit your needs best, if Gaming were always taking place.
In School:
If you’re using a Mac for school then Multitasking is occurring most often (i.e. using two applications: a word processor and iTunes audio running simultaneously).
So, in theory, i5 seems what you need: Multitasking is being performed, but much less occasionally with gaming occurring.