Then you should take it in 2012 as you will be able to make better use of your 20% tax band, which you wouldn't if you took it in 2011, as I assume your 20% band would be fully used up in 2011 with your salary.
Basically if you are married and your spouse works (earning at least €40K) AND you can get jobseekers benefit after redundancy, you will save PAYE of approx €2,900 if you take the redundancy in 2012.
This is based on the fact that you can earn €32,800 at the 20% rate
If married you can transfer €9,000 to your spouse
JB will be about €10K per annum
This leaves approx €13,800 of unused 20% band
So €13,800 of your taxable lump sum will be at 20% while the remainder will be at 41%
However if you take the lump sum in 2011, it will all be at the 41% rate (incl the €13,800 above)
The tax saving on the €13,800 will be
€13,800 x 21% (41% - 20%) = €2,898
Obviously the above assumes no change in tax free lump sums, tax bands, USC, amounts transferrable to spouse etc in the upcoming budget but I can only advise based on current situation.