Aurifil variegated comes in 50wt and 28wt as well as 12wt. I prefer Aurifil 50wt for quilting on my domestic machine. I can't imagine using 28wt or 12wt for free motion quilting; would be far too heavy for me. Here is a link to a site that sells all 3 weights of Aurifil variegated (see lefthand column for all Aurifil choices):
http://www.redrockthreads.com/aurifi...-varmako50.asp
Edit: Oh, the variegated comes in 40wt also, as Becky noted!