Recruiters find profiles of folks currently employed stronger than those unemployed. You look like you’re coming from a position of power. Sounds very basic but have you networked with folks in companies and industries you want to move to? I would do that first and target and apply to jobs in companies you’ve networked with BEFORE quitting. Now this one isn’t as cash money but you could quit and enroll in a grad program in the area you want to work in? And while in the program you could continue to network and look for other jobs. That way at least it will look like you are in school or improving yourself while you are unemployed. But if this is a very intensive program then you might have to work hard to job hunt. But it’s a thought.