Peter, I tend to go with trickerdave on this. If you are contemplating performing with your guitar, you really need to have a pick-up system fitted.

I know all the arguments about it sounds better through a mike etc rtc but the hard facts of the matter are that if you are going to sing and play at the same time, you need to get your guitar fitted with a pick-up system Oh, and you also need a DI box of course and the appropriate cords.

Murray