When Nvidia released their RTX 3070 at the end of last year, it was by far the most compelling GPU in their initial RTX 30 line-up. Offering RTX 2080 Ti levels of power for a (supposed) fraction of the cost, it remains my graphics card of choice for those after high frame rates at 1440p and playing games in ultrawide. Even though graphics card prices and stock levels are all over the shop at the moment, the RTX 3070 comfortably sees off competition from both of its nearest AMD neighbours, the Radeon RX 6700 XT and RX 6800 (at least until AMD's answer to DLSS gets off the ground on June 22nd), and in my eyes it's almost certainly the graphics card you'll want to watch out for if you're currently thinking about replacing your old GTX 1070 or above.
Now, we have the RTX 3070 Ti, slotting in between the RTX 3070 and RTX 3080 with its alleged starting price of £529 / $599. I say alleged, because in all likelihood you're going to be paying a lot more than that when it goes on sale tomorrow (June 10th) due to the ongoing graphics card shortage. It's a bad time to be buying a new graphics card, and if you can at all help it, I'd strongly urge you to just keep what you've currently got right now - especially since this whole situation isn't likely to resolve itself until next year, according to AMD and Nvidia.