Unlike all other answers, I would say, drive them to your facebook page, create a like gate for your facebook page and redirect users to that like gate and gather likes on your facebook page, when they like your page, redirect them to your facebook page.
Why? Because once you let people like your page, they are connected to your brand and you will gat many more chances to approach them to visit your website or introduce them to your offerings. A whole lot of marketing will be done this way, another benefit of getting users on your facebook page is that this way you can build credibility of your brand. When user see a page with thousand of likes on it, they will think its a credible brand.
And now come to SEO point, driving traffic to your website is important, but repeated visitors on your website benefit your website more then getting new visitors everytime, this way, search engines like google consider your website more credible as the people who have visited your website once are visiting again.
So I would suggest, drive them to a like gate of facebook page, and then get them to your facebook page.