Using a food processor with a metal blade, combine all the vegetables, shallots, garlic, horseradish, and cilantro together. Puree the mixture until slightly smooth. Add the V-8 juice, Worcestershire sauce and lemon juice and puree until smooth. Season with cayenne, salt and pepper. Remove and refrigerate for 6 hours. Slice the lobster tail meat into 1/4-inch slices. In a mixing bowl, toss the lobster meat with the herb vinaigrette. Season with salt and pepper.