The 6700XT has more than 6GB of memory and that's a true winner here. Future Proof First.
Then it might be better to look for a Radeon RX 6800 XT video card. It has 16 GB of memory, and if mining requires more than 8 GB of memory in the future, then this will be a good buy. This video card is also cold and there are no problems with it in mining.
No PoW coin has made it to 5GB yet like Ethereum and ETH pow is going away in September 2022, I believe that 6GB cards still have a long year ahead and 8GB cards are perfect for long term mining, 16GB is overkill, I doubt a coin will made it that far.