Southwestern Gazpacho

6 medium tomatoes -- peeled and seeded

2 medium white onions

5 cups tomato juice

2 medium red bell peppers -- seeded

2 medium green bell peppers -- seeded

2 small cucumbers -- peeled and seeded

1 poblano chile -- seeded and deveined

1/4 cup balsamic vinegar

1/2 cup olive oil

1 tablespoon garlic -- minced

1 teaspoon salt

1 teaspoon black pepper

1/2 teaspoon cayenne pepper

cilantro for garnish -- coarsely chopped

sour cream for garnish