Depends if a 5080 is even worth it, reviews are not yet out.
If the 5090 is any indication, a 5080 will be roughly 10-15% better than a 4080 and still be slower than a 4090.
I'd put money on that if I was a betting man.
I saw a 4080 sell for under £700 on MM recently as well as another 4090 for sub £1.3k.
perfect scaling then... 700 for 4080 used
15% better than 4080 5080 £1k
15% better than 5080, used 4090 £1.3k
at £700 finally getting to see the 4080 come down to where the price s/b originally...a little more than the 3080 (at £700 you'd be getting 49% perf increase for 8% cost increase)...ie a proper price/perf jump rather than a 49% performance increase for 100% price increase(for 3080 to 4080... 4080S was a 51% icrease for a 54% price increase....ie no benefit of buying a new card as the price/performance was the same or worse.
regarding the fe cards, I'm not totally sold on going small, such as the 5090..great if you want to build in SFF, but if you have a larger case anyway, I'd rather get a bigger card. bigger card, more fins to cool, 3 fans to spin slower..should be quieter with less things to go wrong...one review or the 5090 was saying the exhaust fan for the 5090 dumps so much concentrated heat straight up, you have to go for an aio for your cpu, as otherwise the air cooler is just sucking in the jet of concentrated heat blown out by the 5090fe
I likje the look of the Super Solid line from zotac at mo if it'll be msrp..the 4070ti version that came out recently got good reviews..haven't seen any for the new stuff, but hopefully if runs along same line, s/b ok, and 5 yrs warranty