I am about to start manufacturing and I am looking for a board to handle the computation. I have never programmed with these boards before and I want to know why should I spend a dollar or two more on the UNO R3 instead of the UNO R3 SMD? Basically the same question as before, but an answer that tells me a little more would be helpful. I appreciate your reply James, I guess I'm a little more curious than the OP.