The Win 7 vs 10 thing is pretty polarizing. In the end they both have their pros and cons. I have a friend that swears by 7, yet it gave me nothing but fits anytime I tried to install it. Win 10 pretty much installs and configures itself. I've now set up a win 7 part in my box at home and I'm using them both, so I'm better able to compare them. I will say that it's nice to use 7 and feel like you still own the fucking machine. Win 10 is a never-ending series of nag screens, forced updates, and outright denials. When a computer I built years ago tells me I don't have permission to access a god damned file it really fills me with rage. Win 7 has some interface things that really bug me, and I still haven't been able to get explorer to work consistently across various folders. Otherwise it seems alright to use.
As for graphics, that realtime ray tracing really does look spectacular. I suspect it'll be far easier for developers to work with, as well. That might be the first advancement in graphics that is really noticeable to me. Most of the time it's just more dots coming faster (like that Battlefield demo). The ray tracing actually made it look good. However, I have no need of it. I tend to stay 3-5 years behind graphics.
A couple of months ago my r9 270 crapped out. I shopped around and got a great deal on a 290x, which is still a beast of a card for most purposes. For the last 21 years I've been married to ATI(AMD). Mostly because I use two cards to run 3 monitors, and every time I upgrade cards I shift the replaced one down to secondary. For the last 21 years I've been cursing ATI for their shitty drivers. All the way back to my first All-In-Wonder they've been fucking nightmares. Trying to get two cards from the same family to play nice together really shouldn't be a problem. At this point it's pretty much impossible with ATI. A week after installing that 290x an failing to get it all to work as it should I finally decided to rid myself of ATI forever. Went out and bought a 1060, slapped it in, and haven't thought about it since. It's fucking glorious. It even runs 3 monitors without any problems. It's like coming out of a freaking cave and seeing the rest of the world. Fuck ATI.
edit: Oh, and that was going to be my advice to Grappler. Install Win7 on a separate partition and migrate over at your leisure. Windows actually works pretty well in dual-boots. If you want to keep all of your same program installs and everything you're probably SOL.