I agree that fit and comfort are the main criteria when selecting fins, which suggests that the local diving store should be the first port of call. However, here in the UK, my local diving store does not always stock the gear which I want to buy after researching my options. Some months ago I decided to purchase some full-foot Apollo Biofins because I've always preferred full-foot rubber fins for snorkelling and wanted to try out "modern" fins. I was surprised to discover that only heelstrap Biofins were sold by European dealers, while you get a choice of full-foot and heelstrap versions in the USA. Scubapro seems to do the same thing, only selling its full-foot rubber fins in the States. Anyway, I was determined not to let that get in the way of my choice, so I ended up ordering a pair from scuba.com in the States. They arrived quite quickly and I'm very pleased with them.