Nickel is fine, no compatibility issues with copper. If you don't like the way it looks get the acetal top.
For my tastes the full cover or "XXL" block is the best looking option, so that much is nice.
I'm
very disappointed that it has taken so long to get this block done, roughly 2 months late after an already long wait to even hear confirmation that a block was to be made in the first place. I'll still buy 2 blocks, I'm not going to buy two new cards right now for the sake of spiting EVGA & EK, though I'll be forced to consider alternatives in future purchases.
Asus is a much larger company and may seem like the better bet for a timely delivery but I sure did a lot of F5'ing waiting on the Swift.