I ordered a 16 to replace an 8 yo MBP 15 and went prebuilt over diy simply because I wanted to be sure that the laptop would work when it arrived. Did anyone else choose the prebuilt for a quality control, even though you have the skills and know how to save a few hundred dollars with the diy?
Have 5120x1440 and a 3080. Will barely pull 30 FPS in heavy AAA games at native (Thanks DLSS), but just watching two full screen videos at the same time no issues at 120 hz. As long as it isn’t 3d or ai workloads you should be fine!