I run both Logic X and C7.5 for film scoring. If you have been happily using using Cubase, don’t bother with Logic IMHO unless you absolutely need to. To me, the workflow is unintuitive and it does not support VST 3…and if you’re a VEPro user, this is a HUGE benefit in Cubase. If you are scoring to picture (and again, this is my opinion), C7.5 runs circles around Logic X. For video work, I find LX sluggish and picky when it comes to video formats.
Anyways, only YOU can decide. I must admit, for $199 Logic X is a good deal…but keep in kind there’s a steep learning curve if you’re used to Cubase.