Personally, I'm looking for 2 things:
1. A block for any MSRP card (so the $600 9070 XT or $550 9070). Most of the youtube reviews I saw were with Sapphire cards, so maybe target that.
2. A block that is around $100. $200 for a block on a $600 card is a bad joke. *maybe* I'm out of touch and that's normal now, but 1/3 of the card cost seems excessive unless it's pre-mounted for me.
I'm an engineer, I'm building this for noise reasons primarily. I don't care about aesthetics at all. If black plastic is cheaper than clear acrylic, do that. I don't need RGB. I want the CPU core, RAM, and VRMs to all be cooled. Include thermal pads (generic catch-all term for 'something to bridge the gap if it's too thick for thermal paste) please. It MUST be copper. No aluminum on water-touching components. Don't cut that corner. I don't care about nickel plating.