Hi,
I have the same Juki...do you piece with it...I have only used it for regular sewing like drapery because it is way too fast..I have heard that it is possible to slow these machines down... you don't really need zigzag for piecing and quilting do you?
As far as books go, I like Better HOmes and GArdens Complete Guide toQuiting and The Quilting Bible for basics, good photos and how to...then there are many others for patterns, photos, etc