I have been spinning an Optim/Silk blend from Mosely Park over the last couple of days. It's nice - very shiny and soft.
If you haven't heard of Optim fibre before it is made from a process deveoped by the CSIRO. Fine Merino is stretched and then chemically set to make extra fine fibre, with a similarity to Cashmere softness.
From the CSIRO:
OPTIM™ Fine has increased length and strength, as well as a silk-like
lustre, but retains many of the desirable properties of fine wools, such
as drape, handle, moisture absorbency and comfort.
Here is a sample from VioletLinx: