i think i am fine with my gtx 970, my gtx 970 can rund zelda windwaker in 8k, i tried it out on dolphinHaha. Well, if your PC is powerful enough to run it, GLideN64 seems to be the best right now (it's the only one still in development and fixed many issues other plugins had), you can find that here: https://github.com/gonetz/GLideN64/releases
It does require a lot more powerful hardware than other plugins though.