I have decided to branch out from using my generic sew-all machine foot and buy some new fancy special feet during a sale this weekend at my dealer. I know for sure I will be picking up a topstitching foot and probably an invisible zipper foot (thanks to that clue for the fall patterns earlier) but are there any other feet that will make sewing easier? I have my eye on a bias binding attacher and a narrow hemmer foot, but I don't know if they will really help or make a difference in my sewing. So what do you think ladies, are there any special feet you can't live without? Ones that aren't worth the money?? Share, share! (If it matters, I sew on a Viking Sapphire, making the feet a splurge, I want to be sure they will be worth the cost!)