If it's your first time keeping them, go for boys.
My reasoning is that you'll
have to send them off for slaughter, unlike gilts which you might think "we could just keep them and breed from them". It happens quite a lot, and although it's a natural progression in pig keeping, it's not something I'd recommend until you have a fair bit of experience keeping them.
In terms of looking after, quality of meat etc there really is no difference between the sexes
The main thing is to make sure they are all the same sex - all boars or all gilts - then you've no worries about them in-breeding.
HTH
Karen