I can’t say that I’ve noticed anything, however, my containers aren’t IO intensive either.
I agree completely about the LXC being much more flexible when using bind mounts rather than fstab.
850 watts is my normal server rack load, however, with cameras and other switches I’m at 1100 watts 24/7 currently.
Add another 600 watts if I turn everything on in the server rack.
Yes that’ll work.
Look for an LSI 9207-8i as that should work.
I have 3 of these and like them overall.
https://www.fs.com/products/165979.html