You mention both canon and nikon, and it looks like you are leaning towards DSLRs, so it merits mention: your first (D)SLR buys you into an ecosystem. This is a good thing! You can spend money on really good lenses that will be with you for likely your whole life when you can, and bodies will come and go. So choose wisely, and probably not strictly based on what gets you the best body in your budget at this moment. I'd also recommend a kit that has a really good prime lens (fixed, about 50mm) rather than a junky zoom with a tiny aperture. Honestly, move your feet, crop in post, and you don't need a zoom. The 50mm will take much better pictures, and something like a 50mm f/2 is a lifetime lens. (I just did some looking, and the T5 + the 50mm f/1.8 is about $460, and way better than the kits available at this range for the bodies mentioned).
Now... all that said. I think the best camera in this general price range is the olympus OM-D. Yes, the sensor is a little smaller, and yeah, you won't be starting in on a lens collection, but you get a very well built camera that has weather-proofing that is typically only found on pro DSLRs and a selection of some very good lenses. It's what I would suggest to a beginner who wants to take really good pictures, not worry too much about the gear, and doesn't have plans to make photography a hobby onto itself.