Dazzler if a bit of a commute doesnt bother you, Personaly I would be looking at Lennox Head, Just under an hour up the highway to the QLD boarder, about ten minutes to Ballina and all it provides, still has a quiet rural / seaside village feel about it ..
Muwillumbah can be stiffling hot and muggy during summer and little in the way of a breeze, a lot of new housing estates around it . the town is dated and slowly modernising.