HDD's, SSD's, M.2's are all upgradeable on both and can be changed whenever so they are not the main focus right now. I know more about the Asus unit with lifespan. Just not sure if Sager Unit is super study overtime/lifespan. Laptop won't be carried around a lot.mostly just portable in house and taken sometimes on weekends. OR SHOULD I just go with the Asus ROG G751JT-CH71 ($1,500) with a GTX 970M 3GB which isn't upgradeable and then just get another laptop when I need more performance in the future.figuring that the Asus G751 is basically built on the G750 chassis has shown that it is a solid & stable laptop that will last awhile ( physically & mechanically) . But does the laptop itself last that long and perform well over time ? Does it overheat or physically deteriorate of time and not make it worth it to get this upgradeable laptop.

which I should be good for a while, but I can upgrade them. GPU's are GTX 980m 8GB which are user upgradeable. I was thinking of getting the Sager NP9752 ($2,100) with a 4K screen with the i7 4790k Z97 because that isn't upgradeable but I figure that will last a while without needing an upgrade for gaming and school work.

Does anyone have or has heard of how good of a laptop the Sager NP9752 is ? And how well it performs thru time and use ? The specs seem amazing But how is it over time and is it worth it to get it as a laptop chassis because it is very upgradeable but does it last ?, making it not worth getting with the plans to upgrade it in the future ?

Asus g751jt ch71 specs