I've cut an EOS m with a C100 in the past, and thought the results were pretty good. With the 22mm f2, you've got a really small package (mount on a light stand if you want) for about $300. It records straight for 30 minutes, but 'misses' a few frames at the 12 and 24 minute marks when it splits files. Batteries run 45 minutes to an hour usually, so they'll handle a 30 minute ceremony with no problem.

Just a thought. Really, any APS-C mirrorless camera could handle the job, but staying Canon would help when you're matching colors.

I second the Benro linked above; use it almost daily. One suggestion; go for the flip lock like the one above instead of the twist lock. I have the twist, and it tends to get loose and slowly drift downward.

To Cary's point, I guess the stability is pretty subjective. If you're trying to hold a locked-off tripod shot, you're definitely going to get a bit of shake. But if you add some movement, like a pan/tilt/push to each shot, it will really help smooth things out. I use it for pretty much every b-roll shot, and use tripods for interviews.

Finally, get a fluid tilting head. You'll be so glad you did.

With 27 second chunks of weightlessness and 5 minutes of climb , it would have been a long video... Or a really short one

Any chance you're near Austin, TX? ;)

http://do512.com/events/weekly/sun/chicken-shit-bingo-w-dale-watson

I shoot video with a t3i and an EOS M at least once a week. For the price, I can't think of anything with better quality than the M. The only reasons I shoot more with my t3i are the ergonomics, flip out screen, and the ability to add a battery grip and run for much longer without changing batteries.

As far as lenses go, just my personal upgrade path.
**And note, the adapter to use Canon EF and EF-S lenses on the EOS M is only 45 or 50 bucks**
Canon 50mm 1.8 (workhorse for interviews and low light)
-alternatively, Minolta Rokkor 50mm 1.7 (incredibly cheap, like $30, a great interview lens, but it for some reason mine looks a lot better when it's focused close, but soft toward infinity)
Canon 18-55mm 3.5-5.something (terrible, but at least a wider lens)
Tamron 17-50mm 2.8 (all around fast zoom, not as nice as Canon versions, but for about $300, it'll make you throw your kit lens in a dumpster)
Rokinon 85mm 1.4 (if you dig the shallow depth of field and low light performance, it's less than $300 and looks beautiful)

Good luck

Premiere CC also has a nice 'Merge Clips' function. Select a video file with audio, and an audio file (it works best if they're in the same bin), right click one of the clips and select Merge Clips. Make sure 'Remove audio from AV clip is selected, and you'll ditch the on-cam mic.
I'd say it works 97% of the time. As long as there's not crazy amounts of background noise, it should be all you need