I recently got an Alienware, and I wouldn’t recommend it to my worst enemy. I got a great deal on it through someone who works at Dell. But it is so controlling. I changed the fans because the ones that came with it were too loud, and now it always complains at boot that the fans are not working properly, and I need to click “ok” for it to boot.
It also has proprietary hardware in it. The liquid cooler and PSU are so custom that they wouldn’t fit in any other chassis, and I doubt I could get another PSU to fit in this chassis. Oh, and the motherboard is an L shape, so the I/Os wouldn’t line up with the window if I wanted to swap it out. All the software that came with it was so garbage that I originally re-installed windows. But there was still issues like it constantly rebooting. So I eventually just installed Linux and haven’t looked back.