I have been using thread from this site - I saw them at MQX in Providence RI and got a free spool. It is Poly, not expensive, not linty and works in my Voyager 17 beautifully.
http://www.bobbincentral.com/Embroid...hreads_s/2.htm
I have also use Connecting Thread's "Essential Thread" and it is very nice and my choice for looks but does generate a bit of lint as it is cotton.
I do not use serger thread. Serger thread is designed to be light weight and to have multiple strands used on one seam.