Maybe get the cheapest 3070 you can find, turn on dlss where possible and upgrade again in a generation or 2. Lots of ppl fretting about not having a rtx 3080 or rx 6800xt, why worry when you can just sell and upgrade again, as needed?
The thing that bothers me is, I still can't find a rtx 3070 aib for £500 or lower. I refuse to believe manufacturers couldn't make a reasonable profit at this price, especially since the ga104 die (used for the 3070 and 3060 ti) is much smaller and has 'just' 17.4 billion transistors, compared to the high end die used for the rtx 3080/3090. The gddr6 vram is also cheaper to produce than the 3080/3090's vram.
The absence of high end Ti cards makes me think super variants are planned for 2021 q3/q4, probably using the samsung 8nm fab process, as this deal was renewed.