I agree 38" 1600p is perfect, not to small to read on and not too big to swivel your head. I also have the LG and it's a beast, 175 hz is bitchin'.
No experience with the Alienware though.
I actually got selected, but I got the fucking combo. Gigabyte 3070 + PSU. The irony is my PSU just died so I ordered one from Amazon that got delayed so I bought one from Best Buy and Amazon won't take back the one I ordered.
The ones I have in use I only use for cold storage. That is to say they get spun up once a month? If that? Probably defeats the purpose of the SSHD, but that's all I use spinning drives for now anyway.