I have 3 AIRE boats. All 15'6", 2 E series, 1 R series. I had a D Series years ago and unloaded it first chance. I would replace my R series in a heartbeat for another E. I believe you cannot match the ability to handle large loads, tracking, and everything about it. Maybe it is my rowing style.Going to look at a used E series boat tomorrow. I don’t know anything about them. Would it make a good oar frame gear boat or are these just for paddle boats? Thanks.