"My preference, always with whole wheat bread, is to use white whole wheat flour. Red whole wheat flour may make the bread more dense and hearty (not a bad thing, just a fair warning). Here's a quick post on wheat grinding and deciphering the different varieties of wheat. I like using the vital wheat gluten as it helps to develop the natural gluten in bread made with 100% whole wheat flour and makes for a super soft, fluffy loaf; however, it is optional (others in the comments have already made this bread without it and have reported back with good results). If you decide to leave it out, think about increasing the kneading time by a couple minutes...."