Go for the cheaper ones!
For most riders the difference is minimal, but if you read all the different tyre threads you'l get far more opinions than you want or need; all of the major manufacturers make decent road tyres and it's all down to whether the small profile differences suit your riding style.
FWIW I've got Metzeler Z8 Interacts fitted to my Gen1 and I've got on well with them, but I've had Michelins and Contis before and they've been OK too.
For most riders the difference is minimal, but if you read all the different tyre threads you'l get far more opinions than you want or need; all of the major manufacturers make decent road tyres and it's all down to whether the small profile differences suit your riding style.
FWIW I've got Metzeler Z8 Interacts fitted to my Gen1 and I've got on well with them, but I've had Michelins and Contis before and they've been OK too.