Why make it hard on yourself. The W and N is difficult to quilt regardless of the skill of the quiltmaker. Change the batting. As to needles. Just remember that most all needles (in my opinion and knowledge) come from the same company. The ones you are thinking about may be the same as a general brand of needles. Just because it has a "name" on it doesn't make it any better than another. Colonial Needle Company makes most of the needles sold but just under different names. I once talked to the owner of the company about a "designer name" packaged needle and he told me - 'oh that is our regular Colonial Needle just packaged under another name".
However, your biggest problem is the batting. My suggestion is to change it. I believe you will be happier with the results. Another quilter that I talked with recently said 'oh I buy them by the bulk and repackage the needles".