I have added an item to my wish list today. The records today that I wish I could obtain are Visa Files. According to the United States Citizenship and Immigration Services (USCIS) website:
Visa Files are the official arrival records of immigrants admitted for permanent residence between July 1, 1924, and March 31, 1944. The photograph, large amounts of biographical information, and attached vital records make Visa Files among the most valuable immigration records for genealogical research.