FCP X, Motion 5, and Compressor 4 are all extremely easy to torrent and don't require serial codes. I would highly recommend going this route first with FCP X as it is so very different, and if it works for you then grab yourself a disk from Apple after you give it a whirl.
It seems like a bridge between iMovie and FCP 7 so far, so I really don't understand the marketing strategy. Professionals need upgrades, not revamped software that cuts certain types of support and compatibility.
Keep FCP 7 but definitely play with the new version. Motion 5 and Compressor 4 seem like good upgrades at first glance but I honestly haven't spent more than a few minutes with either yet. It's actually looking like a great option for 90% of the people on this site (get real guys, we aren't all pros), as it has a more advanced interface and ability than iMovie, but doesn't cost $1000. My editing skills are growing but limited, and I've come a long way since iMovie days. Still, FCP 7 is a bit much for me.
Of course if you torrent to keep and not to try, then it's all free to you. But everyone has different beliefs on stealing software, so this post probably applies to both sides in some way.