iGPUs...hmmm..I would say, stay away from these for VR.
1050ti/970 should work but it is possible that you would feel uncomfortable only after a short period of time.
Frame rate instability, etc. are more noticeable to disturb your senses (e.g. nausea, dizzyness, etc.) on VR than on normal monitor.
I would invest a bit more to at least 1070.