Looks like you’ve got some excellent advice already, @erambeck!
Just a bit of perspective… 20 years ago, none of us had ever heard of a camera that could take usable pictures at ISO 6400, much less anything higher! We modern photographers are spoiled with our fancy sensitive equipment that can get details out of murky shadows that would have made Ansel Adams swoon! 🙂 Any DSLR made in the last 5 years will do better than most photographers throughout history have ever had. Certainly you want to get the best camera for the price, but you can be assured that clean high ISO ratings aren’t going to be what makes or breaks a picture. If that was true, then good pictures could never have happened till the Nikon D610 came on the scene! See what I mean? 🙂
All that being said, I was blown away by how much better dynamic range and noise control my Pentax K-5IIs (equivalent to D7100) had compared to my cheapie entry level Canon Rebel T3. I would never want to go back! Just don’t buy into the fib manufacturers push that high shutter speed or ISO ratings are important. They’re NOT! Not compared to the human skills that go into making a good picture. Otherwise monkeys could be photographers. 😉 🙂