Let's get this out of the way first: Turntable changers are the worst, and I'm a horrible person for using one.
But they're also very useful, and I find that I do most of my vinyl listening on my changer (1973 Magnavox console with a micromatic changer), because I can have a stack of records on in the house for more than an hour at a time - great for entertaining or playing with the kids. Unfortunately, the console's line out has crapped out, so I can no longer send the audio to my main AV system.
So the question is, what are some good standalone models I should keep an eye out for? Is there such a thing as a "high-end" changer? I'm obviously not going to find an audiophile-quality unit, but one that sounds good and doesn't destroy my LPs shouldn't be too hard to find. If the cart is upgradable, all the better, but not essential.