Add potatoes to enough water to cover in large pot. Bring to a boil. Boil until tender; drain. Chill in refrigerator until cool enough to handle.
Peel potatoes and chop; set aside. Combine mayonnaise, sour cream, mustard, vinegar, salt, pepper and sugar in bowl and mix well. Stir in celery, onion, green pepper, pimento and jalapeno. Fold in potatoes, eggs and relish.
Chill overnight for best flavor. Garnish with paprika.