You have made an excellent choice as the Royal Sun is a nicer hotel,between Santa Susannah and Malgrat,and their are a couple of h-top hotels within walking distance(planamar,santa susannah apartments),also you can use the free bus to get around even if it is a bit irregular.
Regarding hotels in other resorts the Casino Royal (assuming it has not been recently renovated),has in my opinion the best bar but the most stairs and the grubbiest rooms and noisiest location,however is where the market is ,while the Royal beach and Royal star in lloret are 4star but family orientated,and the Pineda palace and Paradise park are where its nice to get away from it all,and the Amaika and Calella Palace are 4star and near the shopping precinct and ideal for shopping,and the olympic has the best pool in my opinion.
So if you do use the free bus to get around dine out 4star,drink 3star,and shop till you drop.
Bon Voyage!