Hi, the Paraiso and Ciudad Blanca are both by the beach and reasonably quiet (Ciudad Blanca you'd want to be fronting the beach preferably rather than the main road), but both are just across the main road from what might be called the "Bellevue area", so loads of fun. Both offer you the best of both worlds. The Playa de Muro hotels - less fun perhaps, maybe a bit quieter. Check out also the Orquidea Playa, this is a bit further away from the Bellevue area, but in a very quiet spot by the beach. Website:
http://www.almarsa.es