Are you self employed or a director of your own company? If you have an executive pension, I would assume you have a company.
Usually if paying a lump sum off the mortgage, the reduction in monthly repayments isn't that significant. But if you maintain the same monthly repayment, you will knock years off your mortgage term and get it paid much quicker.
With regards to which pension to contribute with, look at the charges of your existing one and whatever the direct sales team in Irish life sells you. Remember, the direct sales team earn their income through commissions so you are not necessarily getting a better priced pension by going direct.
Steven
http://www.bluewaterfp.ie (www.bluewaterfp.ie)