First off you got to go with what will make you happy. IF grades are your goal go for that. If this business is fun for you and a passion go for that. If you are wondering about college I would think the internship will be far better than being valedictorian. Once you are in college your high school GPA will not mean a thing but the experience from an internship will get you alot farther. Plus if you get a 4.0 GPA on the regular scale it will look better than a weighted scale GPA. When I was in high school I had the opportunity to do college courses. They lowered my GPA and I was not valedictorian. I am in the honors program in my college and doing great. Grades are not the end all beat all. In life it will be your experience that makes the difference. Go for what makes you happy. Oh just make sure that this program will still give you all the prep you need for a college education. Sometimes these programs are meant for people that are not meant to go to college and prepares them for a job right out of highschool.