We typically purchase center-cut salmon and slice them into filets ourselves. This way, they're all the same thickness and will cook at the same rate in the pan. You can use frozen salmon filets here but you will want to let them thaw in the refrigerator and pat them dry before beginning.
Pinot Grigio, Sauvignon Blanc, or Chardonnay are all good options here. If you would prefer to cook without the alcohol you can swap it for chicken broth.