Yop,
Most of the online brokers will also offer you a significant first-year discount when you take out a new policy. I did a similar review myself recently, and managed to get 90% off the first year premium on my mortgage protection policy.
As for the extra years on your current policy, I agree with previous replies but would suggest that if you do switch to a new policy it might be prudent to add just a little bit of extra cover (I added 1 year and about €20k in cover) just in case you need to take a top up on your mortgage, or a payment moratorium at some stage and/or possibly extend the lifetime of your mortgage.