This is a Honda V-6.
It isn't going to be real picky about oil or oil filters.
M1 is a good choice, although I think I'd go with M1 0W-30 AFE, which is probably the better oil for the same coin.
Oil filters?
Any mid-tier filter will be fine on this engine.
A Wix or store brand labeled Wix would be fine.
P1s used to seem a great value, but I'm not so sure now with all of the evidence of media failure we're seeing now.
This is a nice gneration of the Legend.
Enjoy it!