What... are you making? Sweater, hat...?
Elann's HW is softer than WotA and is really about the same price. Plymouth Encore is nice, doesn't really pill that much and is washable. Don't know much about the others.
I don't think pilling is a much of a problem, that may be from the gauge (looser fabric pills more than tighter) or from washing frequently, and I think if you turn the item inside out it lessens pilling.
sue- knitting heretic