McCall's 6400, view B is one of the easiest and QUICKEST tops I've ever made! Front and back, from the same pattern piece and BOOM! You're done! I cut the extra large because I wanted a lot of drape and "off-the-shoulderness".
The brown top which I wore for date night is made in a rayon/spandex that I picked up from Jo-Anns. And the gray top that I wore the next day for lunch is in a cotton/blend t-shirt knit that I found at Hancock.