Sounds a big, but potentially doable aim for the marathon then if you haven't done many marathons, and if you don't lose much over distance...but if ever there's a distance you can smash a massive wodge off it's that one.
I think I'll stick with the more casual yearly aim of pb at the 5 distances I race at for 2013.
Only 3/5 this year, unless we can count getting a 10k pb within a 10miler, which we probably can't.
So 3/5 only 
Edited: 28/12/2012 at 15:52