Well, here is a page of reviews of the 936:
http://sewing.patternreview.com/cgi-bin/topsearch.pl
and here are some reviews of the 910:
http://sewing.patternreview.com/cgi-bin/topsearch.pl
Have you considered other sergers? I'm not up on all the latest features, but if I were in the market for a serger today I'd really want the cover stitch and maybe jet air threading. What are computerized settings?