You have to go with school. You'll make your life through school, not basketball. If you're a junior or senior (it looks like you are, since you're taking the SATs), you gotta focus on school right now. Lack of sleep is torture. I'm going through a similar situation right now, having 3 APs, but since I'm a sophomore, I don't have to study for any real standardized test (besides the PSAT, but I took that last Saturday). From the late nights I stay just to finish my homework (on top of b-ball tryouts right now), lack of sleep will make you feel terrible. It's harder to think when you have classes like calculus and physics, and you never want to start to do any work until it's 11 o'clock at night! Anyway, that's my situation. I don't know about you, but if you have a tough time as it is, just stick to school. If you honestly think you can ball without it affecting your academics, go for it.