I choose the first class option which I should get it on release day or next day max. If you really want to make sure you get it on release day maybe the Expedited (1 business day(s)) option will be the best.
I chose first class option too but wasn't sure what the score was with pre orders. Expedited costs what? £7.50? I'll stick with first class then. For the sake of one day possibly it doesn't seem worth it to me. Thanks for the info.