running trainers

just wondering if anyone could share there advice on the best running trainers theyve used in a marathon, half marathon training etc!! im running the liverpool marathon in october and looking to start breaking in a new pair asap but not sure which ones to get yet as had so many mixed reviews, looking for lightweight obviously comfort and especially round the toe area too which is wear ive been struggling with in training, any advice will help please, thanks guys!!

Mate,  I'm running in the Liverpool Marathon too.  I had a few problems with my feet and i tried all sorts of different trainers.  Eventually I bit the bullet and went to a specialist sports shop who did an assessment on my feet and gave me a few pairs to try.  They sent me running down the road and all sorts. It took about an hour from start to finish.  I ended up with a pair of Brook's that have also had a 6mm shim fitted in each shoe.  I was surprised, the trainers, included the assessment cost £80.  Best money I have ever spent in my life.  No more black toes for me! I don't know where you live, but I'm sure if you search online you can find a shop that has properly trained people that can do the same thing.