Congrats on the upgrade to all grain! You'll love the control and freedom.
Pale malt can mean any pale base malt. For example 2-row. There are numerous types of base malts though, marris otter, pilsner, the list goes on. Generally speaking, 2 row works for most styles, or at least can be substituted in without much difference. But there are some styles that demand specific base malts, such is the case with pilsner and Belgian styles.
Easiest thing to do would be to google 2 row vs marris otter vs pilsner. Or something along those lines. There is too much info out there to quote you a reply. I would think 2 row or marris otter would work in an Irish ale, but I'm no expert on the style. Others may want to chime in.
Good luck and feel free to post any other questions.