I looked upon Special effect and I am really surprized to see that they are really doing some great work so that everyone can enjoy playing games despite their limitations. Great word guys hands off
Considering your requirement I think ASUS TUF Gaming Fx504 will be best for you.
It will give you enough power to boost your gaming experience and you can easily use another monitor with an HDMI cable attached to it. Also as you said that weight is not going to be an issue for you I think you...
My vote goes for MSI's GS65 Stealth as it delivers better-than-60fps gaming performance and a premium, portable build with long battery life.
But I wish it had a little bit premium feels to it ( it's my personal opinion though )
Considering what you want to do with your laptop my recommendation to you will be to go for MSI GF65.
You should add one more 8GB ram for you know extra boost but please don't go for "Brand new factory sealed" title what ever the model is.
it might cost you some extra money but at least