If you are going to be grading TV series in the future I would suggest purchasing an AVID license so you can handle the conform in a professional manner….
FCP 7 is dead and in a couple of years will not be used on anything at all. FCP X is barely being used on longform broadcast material and most major companies that were using FCP 7 were so burnt by the way Apple treated them that they won’t consider betting on their software in the future. The companies I work with that have 40 + edit stations that were on FCP 7 have gone to AVID in every case. I hear that some smaller shops are trying Premiere with mixed results.
I would purchase AVID and transcode / consolidate to DNXHD and go AAF – good, solid, professional workflow.
AS