One thing to watch out for when purchasing Perennial Peanut is to make sure you specify to the grower that you want Ecoturf, Arblick, Brooksville 67, or Brooksville 68. These are the only available low growing ornamental varieties. As Ric said, Ecoturf is probably the best one available.
Some growers are propagating an entirely different species of perennial peanut commonly sold as 'Golden Glory'. It grows by above ground stolons instead of below ground rhizomes making it less cold tolerant in the central and northern parts of FL. It also does not fix nitrogen as well and usually has chlorotic looking foliage.