s40 B&W photos

[imcg]

Hi, recently got myself a s40 - stunning machine. Any advice on B&W. There is an auto B/W mode on the dial which seems good enough in most circumstances. Will I get better results in full manual colour mode and post process to greyscale at my PC? ( I grew up doing B/W on semi manual SLR) To be honest, I'm being too lazy to find out for myself - but if someone has looked into this before, I would love to hear

Iain McG