In New Jersey I would say you will have good luck with a large variety of iris: all the bearded iris varieties from Miniature Dwarf Iris to Tall Bearded, Japanese Iris, Siberians, and Spuria especially. It will really depend on which styles of iris you like.
You asked about favorite coloration. Well I love a mix of all the colors. There are many on this site who prefer the blues, or pinks. I like a lot of the blended iris that have a mix of color on their falls, and the reds, and those with space age appendages, but especially those that have a really nice scent.