The herman miller aeron is the best chair ever. other chairs I've tried all feel so much worse, and ventilate terribly. I recommend removing the back support to make them even more comfortable.
Also, Patagonia backpacks are really nice. I used one for 9 years of daily heavy use for school, but they also work well for laptops and travel if you get the right one.
I have a very new Thinkpad (X1 extreme Gen 5) and it has been a lot of trouble. Started out with a bad battery which I had to get support to change out. A few months later one of the fans jammed, and instead of being replaceable like on older models, it was welded to the Mainboard, meaning that the entire board needed to be replaced, CPU GPU and all. A few months later, my performance took a huge hit, and I needed to get the Mainboard replaced yet again. The customer support was really great, but they definitely don't build them like they used to.