I was lucky enough to get BOTH worlds… a 17″ MacBook Pro and a 17.3″ Dell Precision Mobile Workstation!
They both have their strengths and weaknesses… I use the MacBook Pro for Graphic Designs and the Dell (Adobe Premiere CS5/After effect) for video editing as the FILES from my DSLR are windows native off the Panasonic GH2.
Those files would have to be ENCODED before editing on the Mac… a nightmare!
With my dell I insert the SDHC card and start editing right away!
If your DSLR is a CANON (.mov h264 based) you should be fine with the MACBOOK Pro… the MacBook Pro has a great display and is less bulky and run Mac OS… but I do hear his fan kicking in more often than the dell…
Before you buy COMPARE Apple with dell as you have good tech support and room to customize your computer with huge graphic cards and plenty of other options: https://www.dell.com/us/soho/p/precision-m6600/pd
Good luck!