The same answer for the last decade, 1080 TI...
2080 is going to be like 8gb vram, which will immediately be an issue.
1080 Ti has 11g , only 1 less gig that the 4070 super...
It should support "super sampling" but not all the shitty frame gen you don't want anyways.
It 100% sounds like a joke, but a 1080 TI is strangely still a good card. There's a shit ton of articles and YouTube videos talking about it, so dont just take my word.
You may pay a little more, but a 2080 will immediately hamstring you, a 1080 TI and you'll squeeze a couple more years out of it.