If you're seeking longevity purposes that can hang with cross-platform releases at those important developer targeted quality/performance ranges.. I'd consider the 9060 XT 16GB to be the cheapest sure fire bet to meet that crucial longevity stamp of approval especially at 1440p.

I obviously do not have a crystal ball so it's all based on opinion and and prediction.. which is never a surefire bet and the real answer is "no one really knows where we'll be in four years." But DLSS-capable & FSR4 equipped GPUs will likely lower that bar and make lesser cards a bit more capable than we're used to. A card of equal spec/performance is about where I'd personally want to be sitting while developers targeting similar equipment with cross-platform PS5 Pro releases. Sticking to a console comparable GPU with a bit of performance overhead is usually a good strategy as developers spend extra resources optimizing for that exact equipment. That extra performance tends to cover hardware-specific tweaks & optimization that not every GPU can get special care and treatment for (in other words, a release on a console tends to do a bit more with the same power, so to get similar performance you need a bit more raw oomph).

Extra features tend to often be more tech-demo'y that might add a small bit, but often are just too performance heavy/high cost-low reward to really roll out and thus never have a chance to hit both consoles and the largest percentiles (thus they often do not receive that optimization dream-team treatment).

Anything lower and I'd probably want to sit on something like a 3060 Ti 8GB @ 1080P until I can budget for something of similar specs (even though there are some more powerful 8GB/12GB GPUs out there, the 3060 Ti is a very good 'borrow me' card because it has little room to go down).

Again, just an opinion and that's driven by expectations (especially by framerate & monitor resolution). If you want higher framerate and to protect closer to 144hz vs. 60hz for longer (where developers often feel is 'sufficient' for cross-platform AAAs).. something like a 9070XT may be worth it securing to obtain that longer (albeit, FSR4/DLSS should push that window out some years - too).. but then you enter that strange valley where the amount you pay extra now could have gone to a second used GPU in 3-4 years for a lower total cost while not missing out on much quality (see Moore's law). IE: a 3060 Ti with DLSS seems like it's still comfortably chooching in most things and that's been going on a couple years after what we'd expected from a similarly-priced 2017 GPU due to DLSS.