Bring large pot of water to a boil, add generous pinch of salt and boil pasta per package directions. Drain, and rinse pasta with cold water until cooled.To a small mixing bowl, add mayo, sour cream, cream cheese, lemon juice, salt, garlic powder and black pepper and whisk until smooth and creamy.To a large mixing or serving bowl, add cooked and cooled pasta, jalapeños, cheese, and most of the bacon. Pour dressing over pasta and toss to combine. Sprinkle with remaining bacon, cover with plastic wrap and refrigerate for at least 30 minutes to allow flavors to fully combine.Serve cold.