Well it all sounds good on paper, images would really help to make *sure* it's a great stone, but based on that info it is certainly worth bringing in to see it in person if you haven't already. You'll want to make sure it's eyeclean.
Anything under 2 is good, and needs to be evaluated with your own eyes to be sure. But likely, it''s fine. HCA scores are to "weed out" bad performers, and shouldn''t be used as a selection tool. Just a rejection tool.