I was deciding between the same models a couple of years ago and ended up going with the TC5 and DC5. Maybe a bit of a silly reason, but it was the "no lid lock" feature that decided for us. It'd really not be a big deal if we went with a model without that, but I do add an item, shortly after starting a load, maybe once or twice a month. My spouse probably does it about as often. I've been very happy with the TC5.

I've been mostly happy with the DC5, but the DC5's timer dial actually kind of sucks. I've read that you should never spin it backwards and it's kind of hard to hit the "max dry" setting. In hindsight, I'd probably go with the 7s, even though I also prefer the physical dials. So, if you're going for the dryer too and want them to match, I'd consider the TR7.