lol to be honest
i3 is enough for all that
but seeing you said you want ray-tracing
i'd say i5 2.6 - 2.7 ghz should be ok, but no grantees
i7 will cause i think around 1,200 us dollars where i live
and if you want video edit, mac is more preferable, also mac os is a lot more simple than windows so things will go a lot more smoother, i'm currently using mac intel duo 2 and it's already enough but i dont run ray trace, so yeah.
and i think the current mac i5 is around 1300 us dollar while i7 is 1600 us dollar