Big Tim, I have to agree with you that an anthem should be changed every so often to keep abreast of the national feelings. I like your first choice, Pearse wrote that one, he took the idea from a north of Ireland song "Searlas Og" about Bonny Prince Charlie.
I don't know " The Warriors Chant" but it sounds promising. I have always thought that "The Minstrel Boy" would be a good one.
The way it's going over there sooner or later they will need a new one that appeals to all the population of a united island.
Regards