wow did I open a can of worms. Note, the REASON I was thinking small was mostly because my income. Once fiancee's mom said she wants to cover things that actually put me at ease. All I was really trying to say is that this was a big factor in making my backup body choice. There are other factors, like having the cash to get myself into bridal shows. The 2 I am currently enrolled in are $500 and $895 (that one may be cheaper if I decide to run an ad in the hosting companies bridal planner). Both together - that's $1395 ---very close to the difference in price between the 6d and the 5d3. How much income will I gain from either a owning a second mk3 or b, having a booth at a bridal show? My guess is that those bridal shows will pay for a second mk3 much faster thant the mk3 alone would earn me enough for bridals shows or lenses!!!
That brings me to glass - been eyeing the 24mm 1.4, the 100 2.8 macro, and the 135mm 2.0. The 24 is just about the difference in price between a 5d3 and a 6d, the other 2 are a little cheaper but not exactly cheap!
So my wedding isn't, and wasn't the only factor leading to the choice. It was made by reading a ton of reviews, looking at images, and evaluating the body via rental. Are there things that bug me about the 6d? For sure there are, but for the cost, I really enjoy what it brings to the table. And so far, my clients like what's coming out of it too, as client print selections are at about 65% 5d3, 35% 6d (only reason for that is because the mk3 does get more use, afterall it is the better camera so why wouldn't it!!!!)
You did open a can of worms. Haha! Still, remember what I said about mothers in law. Set boundaries early and stick to them. My two were both lovely ladies (well one was - she and I remained "friendly" until her recent death - and one is) but they both knew that my wife was my
wife first and their daughter second. My current mother in law, whom I love, and I get along just fine as a result of having set boundaries early, and have for over 20 years.
Back to the situation. I agree wholeheartedly with your decisions. Getting better glass is likely to be more cost effective vis-a-vis getting a second 5D3.
Getting started is hard and choices need to be made. A 5D3/6D combination is very sensible and hardly a compromise. I agree that the client print selection is more about use and use case than it being the "better" camera. If you're shooting from the back of a dark church, something you may find yourself forced to do a time or two, that extra low light focusing may come in handy. On the other hand, faster action on the dance floor, or during bouquet toss, etc, is when you're likely to pick up the camera with the more sophisticated focus and more fps, unless it's really
dark. Having a backup card in the camera affords a nice bit of security as well...