The 6700XT has more than 6GB 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.
The RX6700XT have 12GB of memory, so is good for a very long time...