My standard advice is to use OEM parts in critical locations of the engine because they have a track record of being thoroughly tested and the quality controls on the manufacturing end are more stringent than the aftermarket, however, I decided on this build to see if the aftermarket could deliver since it's more cost-effective and convenient to buy seals, gaskets, etc. as a package.
I built this engine using new parts from the bottom up and the engine has less than 10 hours on it. Specifically, a new OEM cylinder was used and the cylinder head was skimmed .003" at the time the valve seats were recut so the components comprising the joint were 👌. Tightening torques and procedures were, of course, used and referenced from the Honda service manual.