I personally prefer the second two. That being said, given ghat 25% of your leads come through your website you may want to test each variation to make sure your users respond well to the new design. You should also check how much traffic you're receiving from search engines and prepare for a drop in traffic after launch. If January is a busy season for your business, it might not be the best time for a full redesign. Will these new designs be responsive? I would make sure your new site is mobile friendly.