I will be 75 in April. I'm not sure what you are looking for but based on your 5 miles a day, I personally would go for a base layer, an ordinary synthetic warm coat from a firm like Alpkit (mine cost me about £50) and a single skin waterproof jacket which is not that expensive either, for example, a Marmot Precip. I have one and I also use it as a wind jacket, it works well for me either way. If it's colder I just put on my Berghaus fleece under my Alpkit jacket, then I'm warm as toast.