The list provided is a good one. I would add, it depends on you. March is great weather for bike riding. If you enjoy this, then Sea Pines accessibility is key. GrandevOcean provides access and Monarch is on it. If golf is more important or a secondary consideration then Heritage comes into play with 10 rounds of free golf. If you want an indoor pool, Grande Ocean, Barony and Surfwatch are the choices. Monarch sleeps only 6, but if you have only adults, the real number is 4.