Another Schmetz needle user here. The Schmetz needle I use is the HLx5 High Speed Art. 1842, size 90/14. My machine is a BabyLock Accomplice. It is a high speed, straight stitch machine. I usually by them from a couple of different quilting sites online as that's the only places (quilting shops or Schmetz themselves) where I can find them.
This was the needle recommended to me when I purchased my machine. I was told to make sure that whatever needle I used, if I didn't use this one, to make sure that it was a high speed needle.