I've got the same monitor and although I got the 1080Ti it's not entirely enough to get the most out of my monitor. A 2080Ti would be gold but like you say it costs like gold. R&D is not the issue here. If they'd come up with something truly revolutionary I assume the price would be justified but the performance increase is still way far off what the card actually costs. The 2080Ti should cost 300-400$ less and that's final. I thought about that too but unfortunately I would only get 40% of the 2080Ti's value. I would still have to add €800.