Good question. Nice website, Moi Moi. While there are many choices available, first you might want to think about your offer. For example, you could add a customer testimonial on your form. And, test the "submit" button w/something more personal like, Yes, I love VIP offers.
As far as landing page builders, we use OptimizePress: http://www.optimizepress.com?fpr=rob33

They have a lot of attractive templates by industry and offers. They're customizable too. Here's one we did for a Free 5-day e-class on Webinar Marketing. https://www.robynlevin.com/online_marketing_services/free-5-day-class-learn-how-to-get-more-leads-customers-w-webinars/
Hope that helps you out!