Hi. I currently have a 3kg 2011 17" MBP 2.4GHz quad-core Intel Core i7 processor with 16gb Ram. I make short films for a living and this laptop has been well and truly hammered over the last 5 years. FCPX is a very demanding piece of editing software. I now almost exclusively use 4k footage which has my poor laptop calling suicide helplines. So. my question is; has anybody using this sort of demanding software upgraded their MBP to a new model and really thought it was worth the expense? And, when I say expense, I mean expense: 3600€. Is it much quicker/better than my old model? I state in my title 'downgrading' because I will be forced to accept a smaller screen as the 17" no longer exists. I like my MBP, so not really interested in changing to a Windows laptop. I need my portability , so therefore a desktop is no good. Even though I use ext HD's for my work, I want a decent size built in HD, hence the added expense as they only offer SSD internal storage.