Fixed or variable mortgage and who has the current best rates

I am thinking of going with the KBC discounted variable rate with an APR of 3.45%, is this the best deal that I can get?

Mortgage we are applying for will be under 60% LTV and is 3.5times salary for mortgage of 210K.

Should i consider the fixed option for 5 years at 4.05% APR?

, discussed up to September this year

Thanks elcato, interesting reading on those links, makes ,e want to reconsider

http://www.askaboutmoney.com/threads/ltv-75-and-provider-choice.196226/

Some of the nuances discussed on this thread may also be helpful.