My current system is getting a little long in the tooth and I was thinking of upgrading soon, possibly to a 13" rMBP. How good are MBPs when it comes to video editing? I'm not doing anything too fancy. Just 5-10 minute 1080p videos for youtube. I probably won't need anything more complex than iMovie. Do they become really hot and throttle when rendering the video? I'm sure a Mac Mini and iMac could also do the job, but I really like having the mobility of a notebook. Thanks in advance!