You need to be a bit more specific about your requirements. Are you looking at the full build with the X11SPH motherboard, or will you BYOM? Spinning disks or SSDs? 6gbps SAS or 12gbps SAS? Does “best” mean fastest or something else? Is budget a factor?
Assuming you are BYOM, the most generic answer would probably be to go with the "Set A
(4x) SFF 8643 → SFF 8643 [Mini-SAS-HD (Backplane) to Mini-SAS-HD]" and get a LSI-93xx-16i HBA with SFF 8643 connectors.
But you could get an 8i HBA and a SAS expander card instead. Or, you could go with an LSI 92xx series with SFF-8087 ports and get "Set C
(4x) SFF 8643 → SFF 8087 [Mini-SAS-HD (Backplane) to Mini-SAS]" and save some money especially if you have spinning disks. The 12gbps isn’t something spinning disks can sustain for anything but short bursts of cached data.
If you are getting the full build, it will come with "Set B
(2x) SFF 8643 → SFF 8643 [Mini-SAS-HD (Backplane) to Mini-SAS-HD]
(2x) SFF 8643 → SFF 8087 [Mini-SAS-HD (Backplane) to Mini-SAS]"
and you can repurpose the two SFF-8087 cables to go to an HBA with SFF-8087 ports that supports SAS.
You should also be aware of this thread if you are dealing with 12gbps SAS;
https://forum.45homelab.com/t/zfs-write-errors-with-hl15-full-build-and-sas-drives/827/130
the gist of which there seems to be sporadic issues with some of the SFF-8643->SFF-8643 cables provided by 45Drives with drives operating at 12gbps. They never really identified a root cause, so it may only have affected certain builds or a specific batch of cables. But, it is something to be aware exists in case you start chasing the same gremlins.