Sidi's tend to run narrow and my podiatrist, who also rides and is our team podiatrist, doesn't recommend Sidi's for folks with other than normal feet, so at size 14 you may be carrying a lot of weight and need a wider shoe. At 50+ you may need to have orthotic inserts if your feet are flat or have special problems. For road only, especially if you are doing any kind of competition, go with a good road shoe. Even if they are a little expensive, get a good shoe as they are not like running shoes and will probably last you for decades. Road shoes are stiffer and give you more forward motion. Mountain bike shoes have a more compliant sole and are a little easier to walk in, but how often do you walk while riding? Usually just around a rest area, etc, so road shoes with cleat covers work fine.
Specialized has some nice shoes and are decently priced, they also sell different insoles so you can try the inexpensive ones before shelling out for the expensive ones from the podiatrist. Best bet, try and find a store or stores that have several brands and try them on. With a size 14 you're probably out of luck though. Pearl Izumi is usually a little less expensive. As for pedals, get something that is large to give you a nice platform. The Speedplay lollipop pedals are great if you're a racer, but kind of small for a big foot. Shimano has some nice ones that don't cost a fortune and give you a pretty big surface area.