Luke you would be in one shot mode. And yes, do yourself a huge favor and save up for the 5d mark iii. Unfortunately for Canon the only two good focusing systems in their entire lineup are the ones in the 5d mark iii and 1Dx. While the 1Dx is an amazing camera it is just overkill for weddings and events when first starting out. Although I do plan on purchasing one as my next camera to compliment my 5d iii it would be solely for gear lust and not because I need it to get the job done. You could easily own two 5d mark iii cameras for your wedding bodies and never ever miss the 1Dx. Just don't ever pick up a 1Dx in the store and play with it haha...then you will have serious gear lust for that thing lol.