Assos Mille shorts, are they worth it?

Hi

Next May I am doing the London to Edinburgh Rat Race in 2 days, 220miles a day.

I did LEJOG last year in 7 days and used £50-60 Giordana shorts which were fine and I had no saddle sore. However for this adventure I feel that I need to buy some better quality shorts, I have always wanted some ASSOS shorts but just could not justify to the price. Anyway now I am seriously looking and will buy ASSOS and have been looking at the Mille shorts as they for long distance riding but for approx £150 I would need to know that they are far better than others which I know I can find for £90-100.

Anyway any thoughts/views are welcome.

thanks

Steve