lenovo. replaced my old dell precision laptop with a T480 and I'm loving it.
dell pros:
- fast
- solid gpu for the time
- clean look
- came with linux.
dell cons:
- battery swelled up, made the trackpad and keyboard not work. replaced the battery a lot.
- keyboard wore out well before lenovo
- chassis screws fell out and then the hinge broke as a result. this is not a thing with lenovo.
- front edge was too sharp and slightly cut into my wrists. not a show stopper but annoyed me the whole time I owned it.
For your situation 16G may be adequate. But 24 is better.