Reference and FE boards are the safest for any sort of GPU water cooling. Try and look for waterblocks that have ports toward the rear. These cards are unusually tall... however most of the 3080's have reasonably sized blocks.
The waterblocks I've seen work well in most builds are the EK and Bykski blocks because they have ports toward the rear.
The other route you can go is a bottom 280 and top 140, leaving room for the GPU block ports.
Remember a 280mm radiator is similar to a 360mm radiator in cooling capacity... so a 140mm radiator is half a 360mm radiator... so it *is* possible to accommodate larger / taller blocks, *without* having to resort to silly things like a tx240, and still come out with *better* temperatures than a dual 240mm setup.
A bottom 140 + top 280 can be used to accommodate a D5 pump in the bottom. A Top 140 + bottom 280 can be used to get around the very tall cooling ports on some 3090 water blocks, as it gives you 30mm extra clearance on the GPU height. (or 55mm if you choose to not put a fan in that spot, as well).
Winter One's cooling setup is *extremely* flexible, and people still have not realized how good 140 / 280mm radiators can be, when used properly.
