I have been playing with different yarns for a few days now and think that I have found a perfect yarn for this top.
Berroco Seduce: 100 yards (91 meters) per skein
(47% Rayon, 25% Linen, 17% Silk, 11% Nylon)
published gauge - 20 sts/4"
I am able to get a gauge of 11 sts/4" on size U.S. 10 (6mm) needles.