Aside from everything you read or are told about, check features, most important to me is balance, best remote balance. stereo/mono? a few or more tone controls? phase reversal? ..... Maybe you haven’t used them in the past, might not need them now, but you might in a different space later on.
often you have to download the complete manual and go thru it carefully to find what, and how to access features.
some don't even mention or show the remote, it's good to know what remote controls: volume certainly, what about mute, balance,
btw, isn't remote source selection dumb, you have to get to the source to load/start the media anyway. Compare 2 TTs playing same time, perhaps, but day to day ..... gimme something useful or make the thingy a better shape.