Ay, personally I think Jace is a nice, modern name, short, easy to spell, and it works sa Pilipinas and abroad din, which is practical if your family has relatives overseas. It's not too trendy na mawawalan ng dating, pero hindi rin super common like Juan, so your son will stand out a bit in class. At the end of the day, what matters most is na nagugustuhan ninyo as parents at may meaning sa inyo, kaya kung feel ninyo ang Jace, go for it!