Would I be able to get into NYU Stern with these scores?

Going to 11th grade

GPA up to 10th Grade: 3.84/4.00 (have the confidence to raise to 3.9/4.0)
SAT II Math 2: 780
SAT II Korean: 790
SAT: 1500

Classes: Honors Math Analysis, AP Chem (4) [my only two weighted classes up to now]
future classes: AP Bio, AP Calc AB, AP Calc BC, AP Physics, AP Lang, AP Lit, Honors US HIstory, Honors Chinese 5/6, (maybe AP Econ if it fits)

Activities:
Virtual Enterprise (school)
Treasurer for Orchestra
Outside orchestra (was concert master when performing at Carnegie Hall)

NYU Stern is a dream. With my scores, is it possible? or should I retake my subject tests.

I think your SAT sub scores are not too bad for even Stern standard. Are you Korean or Korean American? Then taking Korean would not really give you an additional boost despite the decent score. Many many Chinese or Chinese Americans take and submit the Chinese sub and colleges dont always appreciate it. Consider taking SAT Lit or Lang. Or pick any subject you feel comfortable. If you have 3 strong subject scores, submit them instead of SAT.