If you love simpliworsted but long for more luxury, try Simplintural. This scrumptious natural fiber is a blend of wool, alpaca, and silk. This a rounded 6 ply strand that lends to excellent stitch definition.
40% baby alpaca / 40% fine merino wool / 20% mulberry silk
US # 8 -9 needle / gauge is 4 - 4.5 sts per inch