I would argue against both the 1080 and the 5070Ti / 9070XT. Based on the comments it sounds like the OP could definitely be content with less than 5070 Ti performance, as evidence by the fact that the 1080 might delay the upgrade to Blackwell indefinitely. The OP also already has a backup card din the form of the 1050Ti.
My suggestion is to aim lower to 5070 or 9060XT 16GB (though it sounds like Nvidia is preferred). Get a card that is significantly faster than the 1080 but is cheaper and much less prone to connector issues than the Ti. Take your time, look for a good deal, but don’t spend money on a “backup card” that will dilute both your budget and your will to upgrade to modern hardware.