I have owned multiple gaming laptops,
Also have tested some that i bought for friends,
Sager 8150 / Clevo 150
The most quiet was the G73, on day to day basis i never heard the fans, on gaming you do, but its not that bad, the fan ports are to the back of the laptop so they are not in direct line of you. MSI is noticible even in idle, but the laptop is miles away in performance to the asus that i had, and to me is acceptable, i always play with headphones when im on the road.
Now MSI was noisy.... im guessing because they opted for a single fan with dual holes exhaust to cool the gpu and cpu, while asus had their twin fan design to the back. But now MSI has changed some their design, so newer models might be more quiet than what i have tested. MSI also has their new ghost line that its suppose to be quiet and slim.... hard to believe but who knows, they have improve a lot in the past years into what they are putting on laptops. Sager was also very aggresive on the fans profiles, they were pretty good on cooling but at the expense of noise. Personally i would check on Asus before the others, they seem to have done a better job in terms of fan profiles, but i would also suggest you dont go with high tdp gpus and cpus, so the fans dont go aggresive so easy.
MSI seems to be dropping Optimus, not sure why, mine works perfect, but they seem to adopting a switch style button, where you completely turn off the gpu for usual task and use intel igpu, then you turn it on for gaming.
Even though they will not persue quiet computing as we do, i would try to to check with owners, and the biggest community for laptops, is notebookreview forums
, fill up a thread with the following questions, ### What Should I Buy FORM (Must Read Before Posting!) ###
, go also to the dedicated brand forums, and check with owners see if you get some feedback in terms of noise.
I would probably search for laptops with a dual core and GTX850M, given that they wont be the best, they should be good enough to run Counter Strike fine.