Graphics Card for Virtual Reality project in openFrameworks

Hello everyone, I’m at my last year of my graduation and i’m going to develop an audiovisual experience with virtual reality, it’s basically a concert but the visuals will be in VR and will react to sound in real time. I’m going to use Oculus Rift and openFrameworks for the visuals. At the moment i’m studying which graphics card to buy for the job and for what awaits me after college. My question is giving GPU power and longevity the GTX 1080 is worth it when compared to the GTX 1070? Or should I buy the GTX 1070 and expect to have no problems with the GPU handling my work?

Thank you all for your time
Jorge Barreiros