Your probably not going to like this, but BOTH.
Some things to consider . . .
First, what do you want to do? Be specific. Now is the time to figure out what you want to specialize in. To figure out what you’re good at. We all know tech savvy individuals that seem to be able to work magic on all levels, but that’s usually the result of time / experience. Around my little slice of heaven I’m known as the “Computer Whisperer”, but my focus started out with an affinity for hardware / software. One of the things that college offers is a smorgasbord, which will offer you, among other things, the ability to realize your strengths and weaknesses and chart a course accordingly.
Second, once you have a specialization (e.g. Hardware, Software, Security, Networking, ect., ect.) do some job searching through Monster, FlipDog, and the like. See what employers are looking for from someone with your specialization. Not only whether they want / require more formal education or certification, but what kind of formal education or certification.
Third, it’s been my experience that certifications are only as good as the experience that goes along with them. Certifications are good, but anyone can buy a book and purchase test questions from TestKing, CertifyMe, or the like and then pass the exam. College offers the ability to offer student work, independent study, capstone classes, internships, and the like. If the formal route is not your thing. Build local lab(s), local LAN(s), and the like. Then break them. Then fix them. Record everything you do.
My best suggestion: Create and maintain a portfolio that links formal education, classroom training, certificates, certifications, and experience. It’s a great tool to document your . . . Path / Expertise.
P.S. If you decide to go with formal education . . . Make sure the institution is accredited. You won’t regret that decision later.