Thanks to the KDE community, I’ve finally chosen and ordered a new laptop: a Lenovo ThinkPad X1 Yoga. People heavily recommended the X1 Carbon, which is essentially the same computer except less touch-focused. That led me to the Yoga which seems to fit the bill perfectly: in addition to the necessary touchscreen, according to reviews it has otherwise excellent screen characteristics, a perfect keyboard, great speakers, and a great trackpad. I also like the look and probable durability of the aluminum case. Though it’s not a Ryzen 4000-series laptop, CPU performance is still three times better than my current laptop, so I’m not complaining. Mine arrives in three weeks. Thanks again everyone!