Assuming I've already got a good soundbar (with bluetooth) and a small 2-4 Vinyl Soundtrack collection, would the
Audio-Technica AT-LP60BK-BT be a good choice if I want something new/'sleek' rather than used?
I think one of the main reasons that many people (myself included) recommend used gear for beginners, is that there's really nothing out there being currently manufactured that is "good" while also being relatively affordable (lots of the new gear being produced is all extremely high-end/expensive). Vinyl is a very interesting media in the fact that you have a physical needle running through a groove in a disc, if things are out of allignment, or of poor quality, you're going to end up damaging your vinyl.
A lot of "beginner" or "all in one" turntables tend to use very shoddy cartridges (the shell that holds the needle, or stylus as it's called), with no options to change the weight applied by the cart, meaning you end up with an easy table to use, but one that can/will damage your records.
As for a Bluetooth soundbar, it may or may noy work. Records are mastered with a very specific amplification curve in mind, and require that to sounds anywhere near decent. There's a few ways to solve this: some turntables have a built in "preamp", which will do the work for you. Others will use a standalone preamp to do the trick. Or you plug the turntable into an amplifier/receiver with a specific "Phono" input. Most likely your soundbar doesn't have a Phono input, so you'd need one of the first two options.
That's also another benefit of buying used: amplifiers were a dime a dozen back in the 70s/80s, and many of them can be had very cheap used nowadays. They should all have Phono inputs, and many of them sound quite good. I personally use a solid state Realistic (Radio Shack's old brand) amp from the mid 70s that sounds phenomenal, and I think it cost me $20 CAD back in the day.