Hi
The RTX 2080 even if it is more expensive, its a GPU of actual gen and will be better across the time on every driver update that Nvidia launches, if you wanna something like the GTX 1080 on the 2000 series, get a RTX 2070 and you'll have a good GPU for games of actual and future generations with better performance and then you'll avoid to be stuck in an old gen.
it is just a suggestion.