there is a definite difference between what is good for machine quilting and what is good for tied quilts.
for machine quilting batts with scrim are great (like warm & natural)
for tied quilts (especially if you want fluffy) a high loft poly batt that says (good for tied quilts) is best. there are some fairly (lofty) cotton batts too- but you need to read the package- the ones good for tied quilts say so- what to look for and avoid are batts that need to be quilted every 2"-4"---they are NOT good for tied quilts.
for machine quilting- and a fluffy/lofty, warm quilt my favorite is Hobbs Wool Batt, or Dream Wool...I love the wool batts- they are lightweight, fluffy, warm, easy to work with.