I can see my whipsititching, and it's not always (never) even so I use YLI silk thread. It's strong and the stitches seem to disappear in the fabric. If you plan on doing a lot of applique or English piecing I would suggest using it. I bought a tube of YLI Neutral color thread set and it will last me for years. I also have the MasterPiece Frosted Donut Prewound Bobbins I use for hand sewing/mending/applique. It's fantastic thread.
I bought both here:
http://www.connectingthreads.com/thr...__L600904.html