Slice each block of cheddar cheese into twenty 1/4 inch slices. Cut each block of cream cheese into 18 slices; sandwich between cheddar slices, using a knife to spread evenly. Create 4 6-inch long blocks of cheese; place in a 13x9 inch dish. In a small bowl, combine the roasted peppers, oil, vinegars, onions, herbs, sugar, garlic, salt and pepper; pour over cheese. Cover and refrigerate overnight, turning once. Drain excess marinade. Serve cheese with bread or crackers.