This is a situation where I would say let your local bike store earn some money. Go in, take your bike and wear something you can ride in, and let them fit you for shoes and pedals. No guess work about fit, you will have cleats adjusted to fit your style and if you have fit issues or pain, you can go back and get advice, adjustments, whatever. A great buy on shoes is no great buy if they hurt your feet or tear up your knees because of incorrect fit.