...and what about the Nikon D3200?
LOL! Sorry, I know I am all over the place, but I've spent the most of the day trying to figure out how deep this rabbit hole goes, and man, it's deep!
Stuff this! I am getting a camera for myself now... the wife can borrow it from time to time
Then we really should not be encouraging you
Since you brought up the D3200, I'll give you my view of the APS-C DSLR ranges. Here is a diagram to illustrate the relative ranking of the Canon/Nikon bodies (i.e., horizontal rows indicate rough equivalence):
[table="width: 500, class: outer_border, align: left"]
[tr][td]Canon [/td]
[td]Nikon[/td]
[/tr]
[tr]
[td]1100D [/td]
[td](none, or maybe D3000)[/td]
[/tr]
[tr]
[td](none) [/td]
[td] D3200 (maybe D3100)[/td]
[/tr]
[tr]
[td]xxxD (600D etc.) [/td]
[td]D5100[/td]
[/tr]
[tr]
[td]xxD (60D, etc) [/td]
[td] D5200, D7000[/td]
[/tr]
[tr]
[td]7D[/td]
[td](maybe D7100 or D300, but not really a good match)[/td]
[/tr]
[/table]
.
Before I get flamed (or banned), keep in mind this is my own ranking, based roughly on functionality rather than image quality. It is no secret that Canon does not currently compete with Nikon on image quality at low ISO on APS-C DSLRs (they perform reasonably similarly at high ISO). Having said that, the difference in image quality is mostly of academic interest, and you can capture great, detailed images with either brand.
My ranking effectively goes from entry level (excellent for static scenes, e.g., landscapes, still life, etc.) to professional (geared for high burst rate while tracking fast-moving targets). Build quality naturally increases over the same range.
To illustrate: let us say you want to photograph your small kids running around at a birthday party. What are the features that will make your task simpler? Here are a few:
- Number of (and type of) autofocus points, or how much of the frame is covered by AF points
- An autofocus system that is good at tracking moving targets (which usually implies having many autofocus sensors)
- Burst rate (frames per second) and buffer size (how many shots before frame capture rate slows down)
- Hardware buttons. Can you change the autofocus mode quickly? Hardware ISO button? Depth-of-field preview button?
- Image quality. Not the most significant consideration here, but you probably want at least a clean ISO 1600 or higher, especially with kit zoom lenses
Of course you can use a Canon 1100D to capture this type of photo (kids running around), but your success rate will be low, even if you practice a lot. With a 7D or a D7x00/D300, you should be able to get a decent success rate with a bit of practice.
If you are starting out, though, it is hard to tell just how much camera you need. If you end up being a photography enthusiast, you will certainly yearn for one of the enthusiast/pro bodies if you started out with an entry level model. But if you turn out to be more into landscapes, portraits or still life photos, then the entry level body will be just fine, and you should rather spend your money elsewhere (lenses, speedlights, tripod, etc.).