I'm so sorry to read this - what a shock for you
For some people, the right thing is to wait, for others it's to get another dog straight away. What do you want to do? Could you consider another breed, or perhaps getting a bitch, then perhaps you won't make so many comparisons. I've had generations of the same breed, coming down from 2 sides of the family. I tend to keep a male from a very special female and vice versa, to reduce the likelihood of comparisons.
Another breed is a good option,I get the best part of December off work so i think i will start putting some feelers out.Ma