After going through the uk route like most i forund out about the Irish family permit and told my friend about it who was about to marry a filipino and he decided to go down that route and found it quite easy.
Some differences;
Rhea - visa extension = £595 Mary Ann(his wife) = Nothing
Rhea - ILR = £750 Mary Ann = Nothing
Rhea = cannot get public funds, Mary Ann = Can get funds
Also his wife got a 5 year visa. In my experience if you are from any part of Ireland it is the way to go!!