hey I think the video you found was mine
😄 anyways I'm using samsung msatas SSD PM83 and it's been two years with the mod, still going strong. I would suggest you try to find a half size msata ssd now since they are more common than before, that way the msata wouldn't have to bend like mine.
For the screen I upgraded it to 900p and it is a HUGE difference from 720p. I would recommend 1080p for future proof, been looking at this website *panelook.com* and there are 14 inch 4k resolutions now, it's expensive but I would do that instead if i have the chance. (around 250 per panel)
As of GPU, It's going to be impossible or require extreme mod to change it, in my opinion not worth the hassle. If you going to pay 300 for a 860m might as well get a laptop with it installed
Asus G46 vw
3rd Gen Intel® Core™ i7-3820QM processor
16GB-DDR Corsair Vengence 1600
128GB Samsung 830 Msata SSD + 750 GB HDD
GTX 660m + Windows 7 ultimate db Windows 8 pro