No idea about the expensive RoG laptops ASUS makes, they're beyond my price range.
Ooh, I own one! I can comment!
So, I bought mine on a Black Friday sale for $1500 USD (the reason why it was so cheap was due to the fact that it was a previous generation model). As you can probably guess, I haven't owned it for too long so I can't comment on it's life-span, but I can talk about the general experience of owning it.
As a gaming PC, it's great. It has a 1080p monitor, runs most AAA games on high-ultra at 60fps (not 120 unfortunately, unless it's an old game). Load times are fast (except for Rainbow six siege for some reason) and it has over a terabyte of hardrives space. Has 32 GB of ram (Honestly, it's way too much. I wish they reduced it to 16GB and made the computer itself cheaper).
As a laptop for work, it has several flaws. The biggest one is it's size, this thing is so bulky and massive that there is no way you will casually carry it around in a bag. The portability is best used for bringing it to a friend's house for LAN parties or for bringing it somewhere where you are staying overnight (not good for University). Hard to find laptop bags large enough for it.
Another flaw is it's look. Unfortunately it has that "edgy gamer look" toxic shadow mentioned so it may not be the best for a professional environment. The fan is on the back which is great for cooling(back is less likely to be blocked by an obstruction) but it makes it look like a pimp car. Also, sound system is not great unfortunately, there are many post-processing filters (that are easy to turn off thankfully) and every time you plug in headphones, you have to click on a confirmation menu to get them to start working. This cannot be turned off to my knowledge.
Finally, bloatware. These things are filled with a ton of bloatware that you definitely want to dedicate time to cleaning out but it shouldn't take longer than an hour. I have not succeeded in removing all of it yet, but I removed most of it.
Anyway, that's me gushing about a laptop you can't afford, sorry about that. Martinuzz brought it up so I wanted to share my perspective. If you want more advice, there was a conversation in the "Generic computer advice" thread all about laptops sometime in December. Lot's of great advice there.
Ps: One last thing, make sure the laptop you buy does not have windows single language edition on it. It sucks and you'll have to repurchase a proper copy of windows if you accidentally get a laptop with it installed.