Others with more experience can add their opinions, but I wouldn't attend an HA showcase with less than 1,250 SAT or 27 ACT. Of course those numbers won't impress the most selective schools, but I think there will be some schools that can at least start a dialogue at that level. GPA is much more subjective, but if you're on the borderline with standardized testing you should probably be better than borderline with grades and AP classes.
When my son attended HF, there were plenty of schools like Fenway listed, but also a lot that were more like Skidmore: 29% admit rate. Mean ACT: 29. BTW the Skidmore coach is a great guy and that's a beautiful campus.