Depends, I think Avid is used a lot for television post production/editing. I could be wrong. I think, in general, Macs are great for media work, editing video etc. I don’t work in video editing professionally, per say, but in an art/academic environment, and Final Cut Pro is all I’ve ever encountered. I think the two are incredibly similar. I think the film industry tends to lean more towards Final Cut, especially independant film (not sure on large post-production studios but I’d be interested to find out). I think it matters what field of work you plan on going into with editing, and see what the industry standard is for your specific area.